American Idol closed out its 11th season in LA tonight and crowned Phillip Phillips the winner! The two-hour season finale brought out some of music's biggest stars like Rihanna, Chaka Khan, John Fogerty, and Dream Girls legend Jennifer Holliday, who joined finalist Jessica Sanchez on stage for an unforgettable duet of "And I'm Telling You." The judges also got in on the action. Steven Tyler and Aerosmith performed a medley of songs while Jennifer Lopez flashed her abs in a studded bra and got the crowd on their feet with her latest dance track, "Follow the Leader." The evening was packed with exciting moments, including a marriage proposal. Former contestant Ace Young got down on one knee and popped the question to girlfriend, and Idol's season three runner-up, Diana DeGarmo.

Following the results and Phillips's emotional performance of his first single, "Home," he headed backstage to chat with press about his long road to tonight's finale, and how he's processing the win. Phillip said of his big win, "It's so unreal . . . it hasn't sunk in yet, it's just such a blessing to have." Phillip was humble talking about his own success, but Jessica was quick to compliment her competitor, saying, "When they announced it was Phillip I was so happy. I love him so much; he deserved it. He's been having to keep up with his health issues; he's been through a lot more than us, both mentally and physically." Season 11 was full of excitement for the contestants and the judges. However, we'll have to wait and see if J Lo returns for season 12.

Kanye West posed with a Balmain-clad Kim Kardashian at the Belvedere-sponsored premiere of his Cruel Summer in Cannes this evening. Jay-Z and Leonardo DiCaprio's pal Lukas Haas were also on hand for the event, which was Kanye's first at the Cannes Film Festival. Kanye said of the production, "It's actually kind of surreal seeing the film come to fruition right here. I can dream one day that this will be the way that one day people will watch movies. I want to change what entertainment experiences are like."

Kim and Kanye spent the day together in the South of France and stuck by each other's side for tonight's bash as well. We spotted them showing serious PDA and kissing throughout the party. Jay-Z, meanwhile, snacked on sushi and bobbed his head when the DJ played Beyoncé's "Love on Top." Some of Jay-Z's own jams provided the soundtrack for the big night as well.

Nicole Kidman, Zac Efron, and Matthew McConaughey met up in Cannes this afternoon to promote their film The Paperboy. The costars chatted about their project on the French TV program Le Grand Journal. Zac's face was freshly shaved after he took off from LAX yesterday with a scruffy mustache. Matthew, meanwhile, was looking handsome for his latest event following an appearance with fiancée Camila Alves at Baoli Beach Tuesday. Nicole traveled to the South of France during a break from filming her newest movie, The Railway Man, in Scotland. There are so many stars at the Cannes Film Festival already, and the fun continues until the end of the week so stay tuned for more from the glamorous overseas event.

Diane Kruger, dressed in Nicholas Kirkwood stilettos and a straight-off-the-runway look from Prabal Gurung's Fall '12 collection, cuddled up to boyfriend Joshua Jackson at the Nights in Monaco Gala in Monte Carlo tonight. The philanthropic event brought out some of Hollywood's biggest stars and also raised funds for the William J. Clinton Foundation and Prince Albert II of Monaco Foundation. Diane's amped up her red-carpet looks for the Cannes Film Festival, where she's judging the competition, and tonight was another knockout look. She's been busy attending screenings and press events, but she took a night off from work over the weekend and joined Josh on a romantic dinner date. We've been on the scene checking out the hottest films, chatting with your favorite stars, and tracking all the fashion. If you've missed a moment of the glamorous film festival, check out all the photos from Cannes!

Model Karolina Kurkova relaxed on the deck of Robert Cavalli's yacht in the South of France today. She wore a tiny bikini for her time in the sun, which comes after a string of glamorous appearances at the Cannes Film Festival. Karolina attended a bash with pals Petra Nemcova and Gerard Butler earlier this week and also hit the red carpet for the premiere of Brad Pitt's Killing Them Softly yesterday. Karolina's fiancé, Archie Drury, was by her side for Monday night's party, and she had the company of friends, including Eva Cavalli, for her afternoon of outdoor lounging.

Reese Witherspoon hit the tennis court with friends in Brentwood, CA, this morning. She grabbed a racket for the workout session and showed off her pregnant belly in a fitted top — check out FitSugar's picks for comfortable maternity activewear. While Reese awaits the arrival of her third child, she's been spending time with family. She went for a hike with her kids, Ava and Deacon, and father, John, on Saturday and joined husband, Jim Toth, to watch Deacon's flag football game over the weekend. Reese also had some recent professional excitement, since her romantic comedy This Means War was released on DVD this week, and we got an exclusive look at a deleted scene from the movie.