It was a fun-filled and festive weekend for pop fans with some of music's biggest acts gracing the stage at Capital FM's Jingle Bell Ball. Hosted at London's O2 Arena, the two-day pop concert welcomed the likes of Justin Bieber, Coldplay, Ellie Goulding and Jason Derulo to entertain the masses.

Selling a staggering 16,000 tickets across the weekend (5 and 6 December 2015), the 2015 Jingle Bell Ball was certainly one of the radio station's most successful to date. US singer Ariana Grande did not perform after cancelling her appearance and other international dates in the days leading up to the event, but her pop peers held down the stage in her absence. For those who may have missed all the action, the IBTimes UK rounds up the highlights from Capital FM's Jingle Bell Ball 2015...

Justin Bieber strips down during epic set

The Canadian superstar can always be counted on to deliver an energetic performance. Bieber, 21, treated the sold-out audience to a medley of the latest hits from his new album Purpose, including What Do You Mean? and Where Are You Now. However, he certainly riled up the audience when he stripped down and lost his shirt during his rendition of Sorry.

Coldplay bring the house down

The British rock band certainly know how to put on a show and they stormed the stage to open the Jingle Bell Ball on Saturday (5 December). As well as songs from their new album A Head Full Of Dreams, Chris Martin and co took a trip down memory lane with their previous hits such as Paradise, Fix You and a Princess In China. Their set served as a warmer for when they headline the NFL Super Bowl half-time show in February 2016.

Little Mix's Jade Thirlwall and Jason Derulo dating

Derulo rivalled Bieber in the topless stakes but that is not what had everyone talking over the weekend. The US singer was joined on-stage by Little Mix for a duet on Secret Love Song and the lyrics apparently could not be more accurate. Thirlwall, 22, confirmed backstage that she and Derulo, 26, are in the early stages of dating.

Little Mix snger Jesy Nelson told The Sun: "She's got someone on the go. His name starts with a J ... then a D. He's so lovely. Really sweet. He gave Jade a little wink when we introduced him on stage. There's four of us but he looked to Jade and gave her a wink," while Thirlwall added: "He's very hot. It's early days."

Calvin Harris and David Guetta bring the dance rave

Leave it to two of music's biggest DJs to start the party. Harris and Guetta performed on separate days of the Jingle Bell Ball but both were equally as good with the former reeling out hits including Blame, How Deep Is Your Love, Sweet Nothing and Summer, while Guetta treated the audience to an epic 35-minute set.