Katy Perry arrives at A Celebration of Carole King and Her Music to Benefit Paul Newman's The Painted Turtle Camp in Los Angeles on Dec. 4, 2012.
Reese Witherspoon attends the Children's Defense Fund the 22nd annual Beat The Odds Awards in Los Angeles on Dec. 6, 2012.
Prince William and Duchess Kate leave the hospital in London on Dec. 5, 2012.
Simon Cowell and Britney Spears attend "The X-Factor" viewing party sponsored by Sony X Headphones held at Mixology at The Grove in Los Angeles on Dec. 6, 2012.
Fergie hosts Voli Light Vodka's holiday party hosted by benefiting Cell Phones for Soldiers in Los Angeles on Dec. 6, 2012.
Khloe Kardashian attends "The X-Factor" viewing party sponsored by Sony X Headphones held at Mixology at The Grove in Los Angeles on Dec. 6, 2012.
Drew Barrymore attends the Rodeo Drive Walk of Style event honoring Bvlgari in Beverly Hills, Calif., on Dec. 5, 2012.
Courtney Mazza and Mario Lopez show off their new wedding bands at "The X-Factor" viewing party sponsored by Sony X Headphones held at Mixology at The Grove in Los Angeles on Dec. 6, 2012.
Anne Hathaway arrives at the London premiere of "Les Miserables" on Dec. 5, 2012.
Olivia Munn attends the Giorgio Armani Beauty Luncheon in Beverly Hills, Calif., on Dec. 6, 2012.
Jennie Garth attends the eBay event benefiting Toys For Tots in New York on Dec. 6, 2012.
Demi Lovato attends "The X-Factor" viewing party sponsored by Sony X Headphones held at Mixology at The Grove in Los Angeles on Dec. 6, 2012.
Molly Sims takes her son Brooks shopping in Los Angeles on Dec. 5, 2012.
Jessica Biel attends the New York premiere of "Playing for Keeps" on Dec. 4, 2012.
Dierks Bentley attends the Grammy Nominations Concert Live!! at Bridgestone Arena in Nashville on Dec. 5, 2012.
Kendra Wilkinson attends the STiKS Arcade for Hurricane Sandy Relief at Boulevard 3 in Los Angeles on Dec. 6, 2012.
Katherine Heigl and her daughter, Adalaide Kelley, are spotted heading out on a flight departing from LAX in Los Angeles on Dec. 2, 2012.
Amanda Seyfried arrives at the London premiere of "Les Miserables" on Dec. 5, 2012.
Alicia Key's attends Keep A Child Alive's Black Ball 2012 in New York on Dec. 6, 2012.
Gerard Butler attends the New York premiere of "Playing for Keeps" on Dec. 4, 2012.
Madeleine Stowe attends the Giorgio Armani Beauty Luncheon in Beverly Hills, Calif., on Dec. 6, 2012.
Jenna Dewan Tatum attends The Hollywood Reporter's "Power 100: Women In Entertainment" Breakfast at The Beverly Hills Hotel in Beverly Hills, Calif., on Dec. 5, 2012.
Sacha Baron Cohen and Isla Fisher arrive at the London premiere of "Les Miserables" on Dec. 5, 2012.
Kate Walsh attends the Rodeo Drive Walk of Style event honoring Bvlgari in Beverly Hills, Calif., on Dec. 5, 2012.
AnnaLynne McCord attends the Four Stories Film Series presented by Intel and W Hotels at the W Hotel Los Angeles – Westwood on Dec. 4, 2012.
John Krasinski attends the New York premiere of "Promised Land" on Dec. 4, 2012.
Jon Hamm attends the Comedy Bang Bang Nativity Pageant at the Ricardo Montalban Theatre in Los Angeles on Dec. 4, 2012.
Uma Thurman attends the New York premiere of "Playing for Keeps" on Dec. 4, 2012.
Emma Stone launches Revlon Nearly Naked Makeup at the London hotel in West Hollywood on Dec. 4, 2012.
Rumer Willis attends the 2012 Mon Cheri St. Barbara's Day celebration in Munich on Dec. 4, 2012.
Stacy Keibler, wearing BagSnob x DL1961 Premium Denim Collaboration jeans, teamed up with NBA legend Dikembe Mutombo and Old Spice to launch Internet sensation "Dikembe Mutombo's 4.5 Weeks to Save the World" in New York on Dec. 4, 2012.
Kate Hudson launches new Almay Intense i-Color Bold Nudes and Smart Shade Mousse Makeup at the NoMad Hotel in New York on Dec. 3, 2012.
Paula Abdul attends a holiday party introducing Jus D'Amour Perfume and The Look Bag hosted by Fredric Fekkai Salon in Los Angeles on Dec. 4, 2012.
Taylor Swift attends the Robert F. Kennedy Center for Justice and Human Rights 2012 Ripple of Hope Awards at the Marriott Marquis Hotel in New York on Dec. 3, 2012.
Jordin Sparks and Jason Derulo arrive at KIIS FM's 2012 Jingle Ball held at Nokia Theatre L.A. Live in Los Angeles on Dec. 3, 2012.
Elle Macpherson attends the 2012 Mon Cherie St. Barbara's Day celebration in Munich on Dec. 4, 2012.
Alicia Keys arrives at KIIS FM's 2012 Jingle Ball held at Nokia Theatre L.A. Live in Los Angeles on Dec. 3, 2012.
Marcia Cross and husband Tom Mahoney attend The Hole Gallery & Playboy Art Basel Miami Beach 2012 celebration at the iconic Delano in Miami Beach on Nov. 6, 2012.
Jessica Chastain attends a photocall for "Zero Dark Thirty" in New York on Dec. 3, 2012.
Jennifer Garner gets breakfast with Samuel and Seraphina at Brentwood Country Mart in Los Angeles on on Dec. 3, 2012.
Alec Baldwin and Hilaria Thomas arrive at the Robert F. Kennedy Center for Justice and Human Rights 2012 Ripple of Hope Awards at the Marriott Marquis Hotel in New York on Dec. 3, 2012.
Anne Hathaway and Amanda Seyfriend attend a screening of "Les Miserables" in New York.
Solange Knowles serves as the guest DJ at the Ermenegildo Zegna fragrance launch for Essenze Collection in New York on Dec. 3, 2012.
Kylie and Kendall Jenner arrive at KIIS FM's 2012 Jingle Ball held at Nokia Theatre L.A. Live in Los Angeles on Dec. 3, 2012.
Kristen Stewart arrives at the Governors Awards at Hollywood and Highland Center's Ray Dolby Ballroom on Dec. 1, 2012, in Los Angeles.
David Beckham celebrates his last game with the L.A. Galaxy with his sons Romeo, Cruz and Brooklyn on Dec. 1, 2012, in Los Angeles.
Holly Madison attends the Animal Foundation Happy Anniversary Hour at the House of Blues Foundation Room on Dec. 1, 2012, in Las Vegas.
Celine Dion and her son are spotted leaving the George V hotel in Paris on Nov. 30, 2012.
Taylor Swift performs at KIIS FM's Jingle Ball 2012 at Nokia Theatre L.A. Live on Dec. 1, 2012, in Los Angeles.
Danny DeVito attended A Celebration of Carole King and Her Music to benefit Paul Newman's The Painted Turtle Camp at the Dolby Theatre in Hollywood on Dec. 4, 2012. The actor gushed about King, "She is such an amazing person. … She's just so giving. When you talk to her, she exudes this warmth. You feel her aura! You want to be close to her." DeVito, who's working on his marriage with Rhea Pearlman, wouldn't spill the details of their holiday plans, but he did promise Wonderwall there would be "Mai Tais — for sure!"
Nikki Reed and Paul McDonald are pictured at Zappos.com Rock and Roll Marathon & 1/2 on the Las Vegas Strip at Night on Dec. 2, 2012, in Las Vegas.
Jesse McCartney attended A Celebration of Carole King and Her Music to benefit Paul Newman's The Painted Turtle Camp at the Dolby Theatre in Hollywood on Dec. 4, 2012. The singer-actor shared how he keeps a level head in Hollywood: "I just care too much about where I am in the world in terms of my own goals, and it's important for me to achieve all of them," he told Wonderwall. "I'm going to be mad if I don't. I'm competitive with myself if I don't. I think that has something to do with it. That and I have a great family and a great group of friends. That's all you really need."
Kerry Washington attends Los Angeles Confidential magazine's 10th Anniversary Celebration presented by Merrill Lynch Wealth Management at SupperClub Los Angeles on Dec. 1, 2012.
Miranda Cosgrove arrives at CNN Heroes at the Shrine Auditorium on Dec. 2, 2012, in Los Angeles.
Snoop Lion poses backstage at PacSun's Common Threads event held at Lot 613 in Los Angeles on Dec. 1, 2012.
Viola Davis arrives at CNN Heroes at the Shrine Auditorium on Dec. 2, 2012, in Los Angeles.
Ashley Tisdale and PUMA presented the students at LA's BEST After School Enrichment Program at Pacoima Charter School.
Sophia Bush attends the one-year anniversary celebration of Monika Chiang at the boutique in West Hollywood, Calif., on Dec. 5, 2012.