LOS ANGELES, California (X17online) - Big Bang Theory's Kaley Cuoco has been tapped to host the 13th Annual Teen Choice Awards.

Selena Gomez & The Scene, OneRepublic and Jason Derulo will all perform at the awards show, according to Fox.

Attendees expected include Justin Bieber, Cameron Diaz, Thor's Chris Hemsworth, Kim Kardashian, Khloe Kardashian, Kourtney Kardashian, Victorious' Victoria Justice, Ed Helms, Pretty Little Liars' Lucy Hale, Shaun White, Bridesmaids' Rose Byrne, The Vampire Diaries' Paul Wesley and Kat Graham, Harry Potter's Tom Felton, Christopher Mintz-Plasse and Nikita's Shane West.

Nominees for the final category, Choice Vampire, were also announced. Up for the award are Vampire Diaries' Wesley, Nina Dobrev and Ian Somerhalder, The Twilight Saga's Robert Pattinson and Nikki Reed, and True Blood's Alexander Skarsgård.

Host Cuoco is nominated for Choice TV Actress: Comedy while her show is up for Choice TV Show: Comedy, but the biggest nominee of the night is The Twilight Saga: Eclipse with 12 nods. Fans can still vote for the second wave of awards through August 5.

The Teen Choice Awards will air live at 8/7 CT August 7 on Fox.