Jessie J returns to stage at Capital's Jingle Bell Ball amid cancer battle

Jessie J made a triumphant return to live performance at Capital FM’s Jingle Bell Ball in London following mastectomy.

The 37-year-old took to stage at The O2 Arena Sunday to perform in front of 16,000 people.

Dressed in a brown pinstripe baseball jacket and matching trousers, she delivered a powerful set.

Fans went wild as she sang hit song, Price Tag.

The fans were eager to see their favourite singer as she made her comeback to stage amid cancer battle.

Jessie admitted earlier this week that while her cancer was caught early and got treated, there remains a chance it could return.

"I've been really lucky, super lucky, to find it so early," she told ABC News. 

"It wasn't invasive, thank god. I know there's a chance it could come back but until then we're living life.”

Her performance was part of a star-studded lineup that included headline act by Kylie Minogue, who wowed the audience in a fringed PVC minidress and later a striking red gown.

Former One Direction member Louis Tomlinson made his solo debut at the event, while Tinie Tempah and Cat Burns also took the stage.