The besties have more in common than their sexy, unconventional style, their constantly changing hair and their pulse-quickening dance moves. Katy Perry has just tied her BFF Rihanna at radio, matching her for the most No.1s on the Mainstream Top 40 chart. Perry’s ‘Wide Awake’ just landed in the coveted No. 1 slot, marking her ninth No. 1. Wow! That’s a lot of chart toppers, Katy!