Here’s an early Christmas treat for everyone—a gallery of hot musicians who rocked out at Capital FM’s Jingle Bell Ball at the O2 Arena in London on Saturday and Sunday.

The musical extravaganza catered to all types of fans. R&B/hip-hop lovers grooved to the tunes of Ne-Yo, Flo-Rida, Janet Jackson, and Dizzee Rascal. Boy band hysterics partied like it’s 1999 with Westlife and the Backstreet Boys. The Sugababes, JLS, and Pixie Lott showed off their UK flair with their latest hits. The Noisettes and Metro Station added some rock flavor to the scene.

The event’s showstoppers were the sexy popstars who dressed like it’s the last day of 2009. There was Lady Gaga who proudly made it to Santa’s naughty list, thanks to her “cherry, cherry, boom, boom” bikini. There was teen sensation Miley Cyrus who raised eyebrows with another provocative outfit. The Saturdays opted for skimpier costumes for their performance. Shakira’s hips didn’t lie as she performed “Whenever, Wherever” onstage.

The two-day show was a success, if you count the 16,000 people who attended day two alone. Fans of all ages uploaded their personal accounts of the event on Capital FM’s website.

Lady Gaga was ushered into the venue as Santa’s reindeer. She quickly changed into a red-hot bikini, fishnet stockings, black lace-up boots, and her famous disco stick when she hit the stage for her six-song set. Check out her red-hot outfit here.

Miley Cyrus brought the “Party In The USA” to London wearing her trademark ultra short shorts, open shirt, and revealing bra.

American Idol Jordin Sparks performed her hit “Battlefield.”

Jade Ewen, Heidi Range and Amelle Berrabah of the Sugababes

Shakira sported another crazy ’do, but her swinging hips did a good job.