|Celebrity Katy Perry|
|Hot Celebrity Katy Perry|
The 26-year-old energized the crowd with a rendition of songs including "Firework," "California Gurls," "Waking Up In Vegas" and "Hot n Cold" while even sharing a smooch with a lucky fan in attendance.
Back in Rio de Janeiro for the first time since 2001 after taking place in Lisbon and Madrid over the past decade, Rock in Rio is the largest music and entertainment event in history, with nine editions held in Brazil, Portugal and Spain.
The festival is taking place this year on September 23, 24, 25 & 30 and October 1&2 at the Olympic Park City of Rock, in Barra da Tijuca, Rio de Janeiro.
Along with Katy, other acts gracing the stage include Rihanna, Elton John, Red Hot Chili Peppers, Metallica, Ke$ha, Shakira, Lenny Kravitz, Coldplay, and Guns N' Roses.