Jessie J + More Strike a Pose at the Jingle Bell Ball

Over the weekend, Capital FM celebrated their annual Jingle Bell Ball, which finds some of the biggest stars from the U.S. and the U.K. stepping out for performances and red carpet appearances. Jessie J, who is a huge name both in her homeland of England and in the States, hit the red carpet, as did her fellow artists and Jingle Bell Ball performers Jason Derulo, One Direction, Pixie Lott, Calvin Harris and the Saturdays.

Sassy songstress Jessie J brought her edgy flair to her red carpet outfit at the Jingle Bell Ball, rocking high-waisted patterned short shorts, a kimono-esque black overcoat, and a midriff-baring black top. Although most of her outfit was black, her purple locks and chain belt added some extra oomph to her look. Jason Derulo donned all black as well, while the guys from One Direction wore varying shades of blue and gray to create a collective casual look. The ladies from the Saturdays also had a color scheme going on, with each of the five females rocking different gold and white outfits. Finally, Pixie Lott found the balance between sexy and sweet with her red, white and black mini-dress.

As for performances, Jessie J entertained the audience at the O2 Arena with live renditions of 'Who's Laughing Now,' 'Who You Are,' 'Price Tag' and 'Domino.' Jason Derulo treated fans to 'It Girl,' 'Don't Wanna Go Home,' 'Whatcha Say' plus more, and the guys from One Direction let the ladies know 'What Makes You Beautiful.' The Saturdays played 'Higher' and 'Notorious,' while Ms. Lott performed 'Mama Do' and 'All About Tonight.' Calvin Harris got everyone dancing with a full DJ set, and Rihanna even showed up to close out the Jingle Bell Ball! Watch her electrifying performance of 'We Found Love' below, and visit Capital FM's site to check out more live videos from the show.

Watch Rihanna Perform 'We Found Love' at the Jingle Bell Ball