People's Choice Awards Preview: 'Hunger Games' Cast, Demi Lovato, More Set To Hit Stage

Stars of 'Twilight' and 'Harry Potter' also on star-studded lineup for show airing tonight on CBS at 9 p.m. ET.

The People's Choice Awards may be one of the more democratic awards shows of the season. After all, it's fans, and not a faceless "academy" of industry professionals, that decide who'll take home the big PCA prizes in categories like Favorite Tour Headliner, Favorite TV Celebreality Star and Favorite Movie Star Under 25. And it's all happening tonight at 9 p.m. ET on CBS.

Host Kaley Cuoco, herself a nominee for her turn on "The Big Bang Theory," promised a fun-filled evening, telling Ryan Seacrest on his radio show, "I'm really looking forward to it and there are a lot of great musical numbers and it's going to be fun." She also joked with the "American Idol" host that she plans on "changing 47 times, 47 dresses. I'm changing every five minutes. I want to go down in the Hall of Fame with that. So we'll see how many times I can possibly change."

So who can fans expect to see on the red carpet? Only some of the biggest A-listers from the worlds of film, TV and music, including "Twilight" stars Robert Pattinson and Ashley Greene; "Hunger Games" leads Jennifer Lawrence, Liam Hemsworth and Josh Hutcherson; as well as Emma Stone, Vanessa Hudgens, Chloe Grace Moretz, Maroon 5's Adam Levine, Julianne Hough and "Glee" stars Lea Michele and Cory Monteith.

Also expected to attend are Dan Radcliffe, Rupert Grint, Emma Watson and Tom Felton of "Harry Potter and the Deathly Hallows, Part 2," which leads all nominees this year. "Potter" heads into the awards with nine nominations for Favorite Movie and Favorite Action Movie, Favorite Actor (Radcliffe), Favorite Movie Star Under 25 (Radcliffe, Grint, Felton and Watson), Favorite Ensemble Movie Cast and Favorite Book Adaptation.

One notable absence is nominee Katy Perry, who was set to make her first public appearance following the announcement of her divorce from Russell Brand at tonight's live event but canceled earlier this week. She apologized to her fans on Twitter, writing, "Unfortunately I will not be able to attend the People's Choice Awards. I want to thank u all for voting for me, fingers crossed! #KATYCATS."

Perry is nominated for a whopping seven People's Choice Awards, including Favorite Female Artist, Favorite Song of the Year ("E.T."), Favorite Pop Artist, Favorite Animated Movie Voice ("The Smurfs") and Favorite Music Video for "Last Friday Night (T.G.I.F.)." PCA executive producer Mark Burnett clearly sympathizes with Perry's decision not to attend, telling E! News that her choice was completely "understandable."

The show will include musical performances from Faith Hill and Demi Lovato as well as comedy sketches featuring Jimmy Fallon, Jane Lynch and the casts of "Parks and Recreation" and Cuoco's own "The Big Bang Theory."

Among the other major nominees are "Bridesmaids," "Pirates of the Caribbean: On Stranger Tides," "The Help," "Transformers: Dark of the Moon" and "Potter" for Favorite Movie. Ryan Reynolds, Pattinson, Johnny Depp, Hugh Jackman, and Radcliffe will vie for Favorite Movie Actor, while Anne Hathaway, Emma Stone, Jennifer Aniston, Julia Roberts and Reese Witherspoon are squaring off for Favorite Movie Actress.

In the music categories, the Favorite Male and Female Artist races are a who's who of MTV favorites, including Eminem, Bruno Mars, Justin Bieber, Perry, Adele, new mom Beyoncé, Lady Gaga and Taylor Swift. The Song of the Year race includes Gaga's "The Edge of Glory," LMFAO's "Party Rock Anthem," Maroon 5's "Moves Like Jagger," Perry's "E.T." and MTV's Best Song of 2011, Adele's "Rolling in the Deep."

Who are you rooting for on the 2011 People's Choice Awards? Tell us in the comments!

Catch the People's Choice Awards tonight at 9 p.m. ET on CBS. And stick with MTV News for red-carpet coverage, winners, fashion and all the buzz.