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.