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.

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Rock In Rio

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

Rock In Rio

People attend the Rock in Rio Music Festival in Rio de Janeiro September 23, 2011. REUTERS/Sergio Moraes

Rock In Rio

Singer Katy Perry performs at the Rock in Rio Music Festival in Rio de Janeiro September 23, 2011. REUTERS/Sergio Moraes

Rock In Rio

Singer Katy Perry performs at the Rock in Rio Music Festival in Rio de Janeiro September 23, 2011. REUTERS/Sergio Moraes

Rock In Rio

British musician Elton John performs at the Rock in Rio Music Festival in Rio de Janeiro September 23, 2011. REUTERS/Sergio Moraes

Rock In Rio

Singer Rihanna performs at the Rock in Rio Music Festival in Rio de Janeiro September 23, 2011. REUTERS/Sergio Moraes

Rock In Rio

Singer Rihanna performs at the Rock in Rio Music Festival in Rio de Janeiro September 23, 2011. REUTERS/Sergio Moraes

Rock In Rio

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

Rock In Rio

Fans attend the Rock in Rio Music Festival in Rio de Janeiro September 24, 2011. REUTERS/Sergio Moraes (BRAZIL - Tags: ENTERTAINMENT)

Rock In Rio

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. REUTERS/Sergio Moraes

Rock In Rio

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

Rock In Rio

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

Rock In Rio

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

Rock In Rio

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

Rock In Rio

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

Rock In Rio

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

Rock In Rio

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

Rock In Rio

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

Rock In Rio

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

Rock In Rio

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

Rock In Rio

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

Rock In Rio

A woman slides down a zip-line at the Rock in Rio Music Festival in Rio de Janeiro September 30, 2011. REUTERS/Ricardo Moraes

Rock In Rio

A clown amuses the public at the Rock in Rio Music Festival in Rio de Janeiro September 30, 2011. REUTERS/Ricardo Moraes

Rock In Rio

Fans attend a concert at the Rock in Rio Music Festival in Rio de Janeiro September 30, 2011. REUTERS/Ricardo Moraes

Rock In Rio

A fan reacts during a concert at the Rock in Rio Music Festival in Rio de Janeiro September 30, 2011. REUTERS/Ricardo Moraes

Rock In Rio

Fans attend a concert at the Rock in Rio Music Festival in Rio de Janeiro September 30, 2011. REUTERS/Ricardo Moraes

Rock In Rio

Fans react during a concert at the Rock in Rio Music Festival in Rio de Janeiro September 30, 2011. REUTERS/Ricardo Moraes

Rock In Rio

Fans react during a concert at the Rock in Rio Music Festival in Rio de Janeiro September 30, 2011. REUTERS/Ricardo Moraes

Rock In Rio

A woman slides down a zip-line at the Rock in Rio Music Festival in Rio de Janeiro September 30, 2011. REUTERS/Ricardo Moraes

Rock In Rio

Lenny Kravitz performs at the Rock in Rio Music Festival in Rio de Janeiro September 30, 2011. REUTERS/Ricardo Moraes

Rock In Rio

Lenny Kravitz performs at the Rock in Rio Music Festival in Rio de Janeiro September 30, 2011. REUTERS/Ricardo Moraes

Rock In Rio

Shakira performs at the Rock in Rio Music Festival in Rio de Janeiro September 30, 2011. REUTERS/Ricardo Moraes

Rock In Rio

Shakira performs at the Rock in Rio Music Festival in Rio de Janeiro September 30, 2011. REUTERS/Ricardo Moraes

Rock In Rio

Mexican rock group Mana lead singer Fher Olvera performs at the Rock in Rio Music Festival in Rio de Janeiro October 1, 2011. REUTERS/Ricardo Moraes

Rock In Rio

Fans reacts during the Rock in Rio Music Festival in Rio de Janeiro October 1, 2011. REUTERS/Ricardo Moraes

Rock In Rio

Singer Adam Levine performs with his band Maroon 5 at the Rock in Rio Music Festival in Rio de Janeiro October 1, 2011. REUTERS/Ricardo Moraes

Rock In Rio
Rock In Rio

Coldplay lead vocalist Chris Martin performs at the Rock in Rio Music Festival in Rio de Janeiro October 1, 2011. REUTERS/Ricardo Moraes

Rock In Rio

Fans react during a concert at the Rock in Rio Music Festival in Rio de Janeiro October 2, 2011. REUTERS/Ricardo Moraes

Rock In Rio

Amy Lee of Evanescence performs at the Rock in Rio Music Festival in Rio de Janeiro October 2, 2011. REUTERS/Ricardo Moraes

Rock In Rio

Shavo Odadjian, of the band System of a Down, performs at the Rock in Rio Music Festival in Rio de Janeiro October 2, 2011. REUTERS/Ricardo Moraes

Rock In Rio

Axl Rose of Guns N' Roses performs at the Rock in Rio Music Festival in Rio de Janeiro October 2, 2011. REUTERS/Ricardo Moraes

Rock In Rio

Fans react during a concert at the Rock in Rio Music Festival in Rio de Janeiro September 30, 2011. REUTERS/Ricardo Moraes