Last updated at 11:40
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Stars on stage for Teen Choice Awards 2014

The stars were all out at the Teen Choice Awards in Los Angeles, as Demi Lovato, The Fault in Our Stars and Tyler Oakley all won big.
Keeping Up With the Kardashians won Best Reality Show and some of the family were there to accept the surfboard-shaped prizes.
Kylie Jenner, Kim Kardashian and Kendall Jenner
The Teen Choice Awards recognise the year's achievements in music, TV and fashion, amongst many other things. Demi Lovato picked up awards for Summer Song and Female Summer Music.
Tyler Posey, Demi Lovato and Sarah Hyland
The awards are voted by teenage viewers, aged 13-19 years. Taylor Swift presented the award for Drama Movie Actor to Ansel Elgort for The Fault in Our Stars.
Taylor Swift and Ansel Elgort
Donald Sutherland picked up an award for his role in The Hunger Games movies, where he plays the baddie!
Donald Sutherland
Tyler Oakley and Bethany Mota were named Best Male and Female Web Choice. But some fans complained that the Teen Choice website hadn't counted their votes, claiming Cameron Dallas is the real winner of Best Male. Cameron won another award though: best Viner.
Tyler Oakley and Bethany Mota
Ariana Grande was another winner at the awards, which also featured performances from Jason Darulo, Magic and Rixton.
Ariana Grande
Not only did she win the Comedy TV actress award, but Glee star Lea Michele also presented Donald Sutherland with the prize for Movie Villain alongside Paul Wesley.
Lea Michele
Zendaya was recognised for her style with one of the surfboard trophies.
Zendaya
Ansel Elgort, Shailene Woodley and Nat Wolff swept the board with The Fault in Our Stars, including a prize for Best Lip-Lock.
Ansel Elgort, Shailene Woodley and Nat Wolff
Odeya Rush won Best Breakout Star. She said she was thankful to be part of the movie, The Giver, which she claimed had "changed her life".
Odeya Rush