Katy Perry and Rihanna Performed at 'Rock in Rio' -- Katy Perry Kisses a Shirtless Guy (Photos/Pictures)

RIO DE JANEIRO, Brazil – Rock in Rio, the world’s biggest music festival kicked off Friday pulling more than 100,000 crazy fans to see their favourite music stars like Rihanna, Katy Perry and Coldplay.

Katy Perry Kisses a Shirtless Guy at 'Rock in Rio'

More than 700,000 people are expected to be part of the week-long event, attracted to see some of the biggest names in pop and rock belting out tunes on Rio de Janeiro’s shoreline.

Katy Perry Kisses a Shirtless Guy at 'Rock in Rio'

On very first day, Rihanna and Katy Perry stole the show with their thrilling performances. Specially Katy Perry when, during her performance, she pulled out one lucky guy from the audience and planted a giant kiss on his cheek! The shirtless guy will probably remember this night forever, and never wash his face again.

PHOTOS: MTV Video Music Awards (VMA) 2011 (Part 1) -- Katty Perry, Britney Spears, Nicki Minaj, Foo Fighters and Lady Gaga Among the Winners

LOS ANGELES – The MTV's annual Video Music Awards ceremony was held in Los Angeles to honor the singers and musicians for their best efforts.

Here are few of the winners with photos below:

MTV Video Music Awards (VMA) 2011: Katty Perry

1.       Video of the Year
Katy Perry, 'Firework'

Singer Katy Perry holds her three awards, Video of the Year for 'Firework', Best Collaboration, and Best Special Effects which she won at the 2011 MTV Video Music Awards in Los Angeles

MTV Video Music Awards (VMA) 2011: Britney Spears

2.       Pop Video
Britney Spears, 'Till the World Ends'

Britney Spears poses with her award for Best Pop Video and the Michael Jackson Video Vanguard Award at the 2011 MTV Video Music Awards in Los Angeles

MTV Video Music Awards (VMA) 2011: Foo Fighters

3.       Rock Video
Foo Fighters, 'Walk'

Dave Grohl (2nd L) and other members of the Foo Fighters accept the best rock video award for "Walk" at the 2011 MTV Video Music Awards in Los Angeles

MTV Video Music Awards (VMA) 2011: Nicki Minaj

4.       Hip-Hop Video
Nicki Minaj, 'Super Bass'

Nicki Minaj poses at the 2011 MTV Video Music Awards in Los Angeles

MTV Video Music Awards (VMA) 2011: Lady Gaga

5.       Female Video
Lady Gaga, 'Born This Way'

Lady Gaga pauses as she answers a reporter’s question in the press room at the 2011 MTV Video Music Awards in Los Angeles.

Alex Steinweiss record album design, c.1948. "Music of Jerome Kern" LP

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Katy Perry Interview

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City Manager Joe Pennachetti

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presenter Helen Skelton

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Susan Hayward - the Fashion

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Amy Childs

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Jane Phillips

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Alex Steinweiss record album design, c.1948. "Music of Jerome Kern" LP

music album design

Helen Skelton's Feet

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'Six Feet Under' actress

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Britney Spears Hairstyles

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Top Model Isabeli Fontana,

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Katy Perry American Flag Dress

Beautiful American singer katy Perry went to dinner at a restaurant in London in a dress made of latex.

Half board is a flag of America, the second half of the flag of Britain.