Diva-Off! Rihanna and Katy Perry Rock Rio

The two kicked-off the world's largest music festival with a big, sparkly bang!!
Katy Perry and her BFF Rihanna rocked the hell outa 100,000 fans last night as they opened the legendary Rock in Rio music festival in Rio de.
Before her performance Saturday, Katy tweeted:
"I'M READY TO ROCK RIO! 100,000 people tonight! I LOVE YOU BRAZIL… [...]

Source: http://perezhilton.com/2011-09-25-rihanna-and-katy-perry

Ehrinn Cummings Elena Lyons Elisabeth Röhm Elisha Cuthbert Eliza Dushku