X Factor 2011: Katy Perry ditches the latex and lollipops for a soulful acoustic performance of her new ballad

Katy Perry ditches the latex and lollipops for a soulful acoustic performance of her new ballad on the X Factor

Acoustic: Katy Perry transformed her usual stage presence for a soulful performance of her new single The One That Got Away on the X Factor

Acoustic: Katy Perry transformed her usual stage presence for a soulful performance of her new single The One That Got Away on the X Factor

Something missing Twitter users were quick to point out that the singer was without her wedding ring

Something missing Twitter users were quick to point out that the singer was without her wedding ring, but it was back in place later when the singer exited the building

Soulful: The ballad was a departure from her usual upbeat pop tracks

Soulful: The ballad was a departure from her usual upbeat pop tracks

Cartoon motion: Her fans are more accustomed to seeing Katy in colourful, larger-than-life stage settings

Cartoon motion: Her fans are more accustomed to seeing Katy in colourful, larger-than-life stage settings

Boy band: The Wanted performed their new single Lightning

Boy band: The Wanted performed their new single Lightning

Entourage: Katy was snapped leaving after the show with her entourage, signing autographs for fans Entourage: Katy was snapped leaving after the show with her entourage, signing autographs for fans

Entourage: Katy was snapped leaving after the show with her entourage, signing autographs for fans