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12 March 2012, 14:47 | Updated: 12 March 2012, 15:03
The 'Teenage Dream' singer will perform her latest hit single on the BBC One show on Saturday.
Katy Perry has been confirmed as a special guest performer at this weekend's Let's Dance For Sport Relief grand final.
The 'Firework' singer is expected to take to the stage on Saturday night (17th March) to give a live performance of her current single 'Part Of Me', which recently shot straight to the top of the US Billboard Top 100.
The BBC One series will see several celebrities competing to be crowned the 2012 Let's Dance For Sport Relief champions, including comedian and actor Omid Djalili and athlete and I'm A Celebrity… Get Me Out Of Here! star Fatima Whitbread.
Saturday's live Let's Dance show will also see 'Take A Chance On Me' band JLS performing their latest single 'Proud'.
Katy Perry is set to release a special edition repackage of her second album, retitled 'Teenage Dream: The Complete Confection', on 26th March.