Here's all you need to know about the 'Califonia Gurl' who began her musical career as a Christian gospel singer.
California Gurl has been named as Billboard magazine's 'Woman Of The Year' for 2012.
Rihanna and Katy Perry are up for several awards at the 2012 music ceremony
The 'We Found Love' singer has recruited a team of a-list stars to help out each week on her Styled to Rock reality show.
The 'Part Of Me' star's insurers are worried the device could cause a serious neck injury.
Emma Stone ditches the makeup and goes bare-faced.
We countdown the top 20 Instagram accounts that you need to know about!
From Adele to Jennifer Lawrence, take a look at Forbes' highest earning celebrities under 30 this year...
Prince William and Kate go to the Cheltenham races and Lady Gaga shows off her 24 carat gold plated wheelchair following hip surgery
The California Gurls singer has premiered the full promo video for her first documentary film.
Watch the new Adidas advert in which David Beckham and Katy Perry go for a run.
The 27-year-old star has unveiled the hotly anticipated music video for her latest single Part Of Me.
Singer unveils snippet of "Last Friday Night (T.G.I.F.). Watch it here!
Recently Played Tracks
To listen live, choose your preferred location:
You may also like...
Katy's BFF moved to the US when she was 16 to focus on her music, good choice!
Apparently the wackiest woman in pop was 'Born This Way'.
Britney's firmly back in the pop world again, would you 'hold it against her'?
She does it 'even better in broken heels', and likes those 'bad boys'...