Rock In Rio is a legendary music festival in Rio de Janeiro, Brazil (and on occasion in Portugal and Spain). Acts such as Queen, Iron Maiden, AC/DC, Ozzy Osbourne, Prince, INXS, R.E.M. have all performed in front of the huge crowds and this year the crowds were entertained by the likes of Lenny Kravitz, Rihanna, Katy Perry, Metallica and Brazilian metal band Sepultura.




1. Fans react during the concert of Brazilian Rock band Detonautas at the Rock in Rio Music Festival in Rio de Janeiro October 2, 2011.



2. People attend the Rock in Rio Music Festival in Rio de Janeiro September 23, 2011.



3. Singer Katy Perry performs at the Rock in Rio Music Festival in Rio de Janeiro September 23, 2011.



4. Singer Katy Perry performs at the Rock in Rio Music Festival in Rio de Janeiro September 23, 2011.



5. British musician Elton John performs at the Rock in Rio Music Festival in Rio de Janeiro September 23, 2011.



6. Singer Rihanna performs at the Rock in Rio Music Festival in Rio de Janeiro September 23, 2011.



7. Gary Lightbody of British band Snow Patrol performs at the Rock in Rio Music Festival in Rio de Janeiro September 24, 2011.



8. Fans attend the Rock in Rio Music Festival in Rio de Janeiro September 24, 2011.



9. Anthony Kiedis (L) and bass player Michael Flea Balzary of the rock band Red Hot Chilli Peppers perform at the Rock in Rio Music Festival in Rio de Janeiro September 24, 2011.



10. Andreas Kisser of Brazilian heavy metal band Sepultura performs at the Rock in Rio Music Festival in Rio de Janeiro September 25, 2011.



11. Singer Derrick Green of Brazilian heavy metal band Sepultura performs at the Rock in Rio Music Festival in Rio de Janeiro September 25, 2011.



12. A fan of Brazilian heavy metal band Sepultura attends the Rock in Rio Music Festival in Rio de Janeiro September 25, 2011.



13. Lars Ulrich of heavy metal band Metallica performs at the Rock in Rio Music Festival in Rio de Janeiro September 25, 2011.



14. James Hetfield, lead vocalist of heavy metal band Metallica, performs at the Rock in Rio Music Festival in Rio de Janeiro September 25, 2011.



15. Fans of heavy metal band Metallica attend the Rock in Rio Music Festival in Rio de Janeiro September 25, 2011.



16. A fan reacts during a concert at the Rock in Rio music festival in Rio de Janeiro September 29, 2011.



17. Singer Janelle Monae performs during a concert at the Rock in Rio Music Festival in Rio de Janeiro September 29, 2011.



18. Singer Kesha performs during a concert at the Rock in Rio Music Festival in Rio de Janeiro September 29, 2011.



19. British singer Jay Kay of Jamiroquai performs during a concert at the Rock in Rio Music Festival in Rio de Janeiro September 29, 2011.



20. A fan reacts during a concert at the Rock in Rio music festival in Rio de Janeiro September 29, 2011.