Katy Perry

First causing waves with the Madonna-endorsed Internet single 'Ur So Gay' in 2008, but it was the follow-up 'I Kissed A Girl' that catapulted her into the big time. After the track topped the charts in over 30 countries, Perry has achieved three more No.1s in the Billboard Top 100, four more UK top 5 singles and two consecutive Grammy nominations for best pop vocal. Like similar pop artists, Katy Perry is known for an unconventional dress sense, though one less self-serious and more fun and flamboyant than her contemporaries like Lady Gaga and Nicki Minaj