It’s my party, I’ll do what I want

Jessie J flashes her sexy toned legs in beaded mini dress... as The Wanted's Nathan Sykes joins her for surprise duet at Summertime Ball.

She often takes to the stage in revealing attire.

And Jessie J didn’t disappoint as she put her enviable figure on display at the Capital FM Summertime Ball on Saturday.

The 26-year-old was sure to put on a show for the large crowd gathered at Wembley stadium as she paraded her toned pins in a 20s inspired dress.

The starlet looked sensational in a beaded white mini dress which she teamed with sheer tights.

Jessie elongated her length further with a pair of white wedged heels as she performed tracks such as Price Tag and Wild.

The former coach on BBC1's The Voice also revealed that her once-familiar black bob hairstyle is back following many months with a shorter blonde style after shaving her head for Comic Relief.

The surprises didn’t stop there as she enlisted the help of The Wanted’s Nathan Sykes for a special performance.

Nathan was on hand to help Jessie deliver a special rendition of her single with DJ Cassidy titled, Calling All Hearts.

While Robin Thicke performs the male vocals on the original track, Nathan was more than capable of filling in the crooner’s shows for the duet.

Surprise: The Wanted's Nathan Sykes was on hand to help Jessie deliver a special rendition of her single with DJ Cassidy titled, Calling All Hearts

The star tweeted: ‘Such an honour to perform with the amazing @JessieJ at @CapitalOfficial #STB

He then added: ‘Also such a pleasure to meet, perform and chat to @DJCassidy!! Legend!’.

Meanwhile, Jessie joked with  the crowds saying: ‘"It's the longest day of summer… so it might even be light until the end of the show!".

Other artists who performed at the event included Cheryl Cole, Miley Cyrus, Rita Ora, Calvin Harris and Ellie Goulding.

Jessie J wears pastel coloured jacket and shorts to the Esquire & DKNY MEN LCM opening party with Chloe Green

The "Alive" Singer broke onto the music scene, because now she’s sporting a more chic and sophisticated look.

Jessie J wears a pastel pink jacket and short suit with a sheer blouse and matching accessories to the The singer arrived at the Esquire & DKNY MEN official opening night party for London

The singer arrived at the Esquire & DKNY MEN official opening night party for London Collections: Men, wearing a pink jacket and matching shorts with a sheer blouse unbuttoned to show a white lace bra beneath.

Jessie completed her DKNY-designed look with a pair of white sandals that showed off her matching pedicure as she joined Topshop heiress Chloe Green for the fashionable event held at One Embankment.

The former Voice UK judge’s outfit was designed by DNKY women, and she continued the minimal theme with a natural make-up look, while her returning black bob was given a centre parting.

Chloe, who designs her own shoes under the label CJG, wore a sheer black T-shirt with black skinny jeans and matching bra, a grey-blue tassled leather jacket and intricate sandals.

Chloe is a fan of DKNY as she attended the brand’s New York party in April, so it’s no surprise to see her at the party which drew in a host of famous and fashionable faces.

Jessie J wows in black floor-length vintage gown at Peace One Day Gala in Monaco

The 'It's My Party' Singer normally known for her edgy approach to fashion.

But Jessie J showed that she can also rock glamour as she wowed in a floor-length vintage black gown as she performed at the Peace One Day Gala in the Salle des Etoiles, Monaco on Thursday.

The 26-year-old singer resembled Jessica Rabbit in the elegant Azzaro dress, which featured a dramatic strapless V-neckline and a thigh-split. 

Jessie J arrives at the Peace One Day Monaco Gala on Thursday evening

She matched the gown with metallic vintage Miu Miu sandals, while her look was perfectly set off with bold diamante earrings and a statement ring. 

Her shoulder-length dark hair was worn swept to the side in feminine waves for a retro look.

Jessie went for dramatic eyes with a rose-gold eyeshadow while her lips were kept neutral with a pale pink glossy lipstick.  

One Peace Day is a global day of action with campaigns and activities in Education, Music, Film, Sport, Dance, Art and Online, to support an annual day of ceasefire and non-violence around the world. 

Jessie poses for a photo with Jeremy Gilley and Jude Law at the event

The organisation, founded in 1999, saw the member states of the United Nations unanimously adopt the first ever annual Peace One Day of global unity and intercultural cooperation in 2001.

Meanwhile Jessie has been jet-setting of late and recently performed her brand new song You Don’t Know Me when she played a gig in Rock Wood in New York

The hit-maker performed some of her best known tracks

Speaking before performing, she emotionally told the crowd: ‘Please forgive me if I get this wrong, I've never sung it before. It's really honest about how I felt in the past year.

‘Fame makes you feel like you have to be happy all the time and people want you to be perfect all the time and sometimes you don't want to take a photo with someone, sometimes you don't want to have a conversation with someone and it's not about being mean, it's about being human.

Jude and Jessie led the way at the special event in Monaco on Thursday evening

‘That's the biggest thing that I struggle with that sometimes people need something from me that I don't have to give and I pretend sometimes that I am OK when I'm not and it makes me feel like I'm going mad,’ she added, before breaking into the song itself.

The singer has also announced that she is confirmed to perform at this year's Capital Summertime Ball at London's Wembley Stadium.

The supple singer gets flexible during her performance on Thursday night

Jessie takes to the stage at the special event

Jessie J and Jude Law pose with English actor, filmmaker and founder of the non-profit organisation Peace One Day, Jeremy Gilley

Jessie J is stunning in a floor-length black dress as she attended the Peace One Day Gala dinner in Monaco

Jessie J arrives at Nice Airport ahead of the event on Thursday evening

A team of stylists get to work on Jessie's hair and makeup prior to the event

Jessie wowed in a vintage dress and shoes with her hair styled into sleek waves

Jessie J Denies 'Magnetic' Is Her Next 'Alive' Single: "I Was Joking!"

The 'Wild' singer says she has yet to decide on which will be the next single from her recent album.

Jessie J has denied recent speculation that 'Magnetic' will be the next single to be lifted from her album 'Wild'.  The 'Price Tag' singer revealed that, while she loves that the track is getting some traction, it isn't yet an official single release.  "Magnetic is not my new single. It's just reacted in some territories and being played a lot on the radio," Jessie tweeted. "But it is not an official single.  "I did an interview and I was told "magnetic" was my new single lol," Jessie recalled. "I was joking when I said 'yeah why not" as it make me laugh because it isn't.  "My humour can sometimes confuse people. I apologise!" she added.  The 'Thunder' singer has spent time out in the US this year working on new music for the US release of 'Alive', and has revealed she's already written five brand new songs .

Jessie J Responds To Fan Comments About Bikini Pictures: "Be Happy And Healthy!"

The 'Wild' singer urges fans to live a healthy lifestyle but not focus on being "skinny".

Jessie J has issued a plea to all of her younger fans to live healthily and to "be happy" and "be strong".

The 'Thunder' singer posted the comments after reading comments some fans posted about her recent stream of bikini pictures during her stay out in Los Angeles at present.

"To all the YOUNG girls commenting on my bikini picture, I am constantly trying to GAIN weight," Jessie tweeted this week. "And as a naturally slim woman at 5 ft 9 I am trying to be an example to any young girl similar to me that being stick then is NOT good nor hot!

"I eat what I want in moderation," she continued. "I am not skinny I am slim. I have meat on my bones and I want more!

"I have never dieted but been healthy and aware that being fit is for life not for Instagram or looks!" Jessie explained. "I work hard to be fit and it's not easy but it's IMPORTANT! For my career and for me!

"But everybody is different. What I have to do is different to what someone else would have to do to be HEALTHY!" She added. "Let your aim to be strong and not a stick.

"To be happy and not skinny, and be healthy and BE YOU!"

Jessie J recently revealed she has already recorded five brand new songs in Los Angeles, while she works on the US edition of her album 'Alive'.

Jessie J Shows Off Abs And Fitness Skills With New Gym Routine .

The 'Wild' singer is seen performing several exercises as part of her new regime.

Jessie J has showed off her fitness skills, and her abs, in a series of new snaps and videos of her in the gym.

The 'Domino' star shared several new pictures online this week after landing back in Los Angeles to work on the US edition of her album 'Alive'.

Jessie is seen performing squats, bicycle crunches and mat work in the various snaps, as well as posting a video of her using a leg machine in the gym while dancing along to the music.

View a snap of Jessie during her workout below..

"This pose always makes me laugh. #squats #la #2014training," Jessie tweeted alongside one of the pictures.Jessie J is back in the US to perform a handful of shows stateside, as well as working on some new music for her US album .

Jessie J rocks a black minidress and a striking raven bob as she leads the glamour at BRIT Awards Nominations Launch

The 'Wild' singer is also celebrating being nominated for British Female Solo Artist at this year's awards show

Jessie J showed off a brand new look at the BRIT Awards 2014 nominations party in central London, opting to return to a dark brunette bob style to kick off the new year.The 'Thunder' singer wowed photographers on the red carpet at this week's event, showing off her dark brown bob and fringe while wearing black textured minidress for the evening.It was back to her roots for Jessie J as she wore a wig to attend the 2014 BRIT Awards Nominations launch at London’s O2 Arena on Thursday. 

The 25-year-old star, who shaved her head last year for Comic Relief, sported a sharp bobbed wig in jet-black with a feathered fringe, which was similar to her signature hairstyle earlier in her career.

She wore a sleek ensemble with a black striped body-con dress and heeled suede boots with a sheer laced design.

And completed her look with a bright red matte lip colour, which she complemented with a sweep of red eyeshadow and a matching red manicure.

The singer carried a simple clutch in black leather with a gold chain design to complete her understated but stylish look.

Jessie has been experimenting with her locks of late, which she is growing after going bald for charity last year. 

Jessie is also celebrating after being confirmed as a nominee for British Female Solo Artist at next month's awards show, following her huge success in 2013 with new album 'Alive'.

Click Here To Watch Jessie J's Pictures In BRIT Awards Launch.