Pretty Girl (Cheat Codes x Cade Remix) Maggie Lindemann
Check out Katy's different looks over the years.
Katy Perry's latest look is this hot pink hair which she showed off at the MTV VMAs.
Katy recently had a two-tone blonde and caramel do.
The singer shows off hot ginger curls while promoting her perfume.
Keeping it chic, Katy wears sleek black waves.
At a French fashion show earlier this year, it's a blue barnet for Katy.
Another blue wig completely transforms the 'E.T.' singer at the 2010 MTV Movie Awards.
Last year Katy added a rainbow of highlights to her brunette bonce.
Is it a bun? Is it a ponytail? Katy manages to pull off two styles at once.
Katy channels the 1940s with neat dark waves.
Did Jessie J model her blunt black bob on Katy's 2009 look?
Katy sports a lady-like up do at a bash earlier that year.
It's big hair for Katy at the 2008 MTV Europe Music Awards.
Early on it's vintage style for Katy Perry in a frilly frock and tight brunette curls.
At the start of her career in 2008 Katy sported a fringe and shaggy rock chick locks.
Honey-coloured highlights were Katy Perry's 'Teenage Dream'. Pic: WENN