Video: Katy Perry Gives Acoustic Performance on the 'X Factor'

| by Michael Allen

On the 'X Factor,' Katy Perry played her guitar and sang with two back-up singers for her new single, a ballad called 'The One That Got Away' (video below). The acoustic performance was quite a departure from her usual latex costumes and cartoon-like props.

She had her hair curled Forties style -- although tinged with pink -- and wore a simple outfit of white short-sleeved shirt and black pants.

Fans on Twitter were quick to note that she was not wearing her wedding ring, but the ring was back in place shortly afterwards, when Katy signed autographs for fans after the show.

'The One That Got Away' isaw the singer show off her raw talent as she harmonized with her band. Perry told 'X Factor' host Dermot O'Leary that she completed the 95th show on her California Dreams tour at London's O2 Arena. Her next stop will be Liverpool, England.