Celebrity Star Tracks - Monday, February 26, 2007 By People Staff Published on February 26, 2007 04:00 PM Share Tweet Pin Email Trending Videos 01 of 13 A NEVER-ENDING PARTY Jamie McCarthy/WireImage The Paris Hilton birthday extravaganza continues! After last weekend's Vegas bash, the heiress was back in Beverly Hills late Saturday night to celebrate her 26th birthday (on Feb. 17) at The Prime Grill in Beverly Hills with Nicole Richie and Richie's beau Joel Madden. Also there: mom Kathy, boyfriend Stavros Niarchos and plenty of friends. 02 of 13 ANOTHER WORLD X17 Have they officially entered The Twilight Zone? Ashlee Simpson keeps a low profile as she and Fall Out Boy bassist Pete Wentz head out for a Saturday night at Hollywood's Sunset Marquis. As for their rumored romance, Wentz told Rolling Stone recently, "Maybe in a different universe, we'd be some hot couple, but not in this one." 03 of 13 WHAT A DRAG Matthew Healey /UPI/Landov It's Harvard or bust! Ben Stiller shows off his best Zoolander pose as he goes through the motions of public humiliation that come with being honored as the Ivy League's 2007 Hasty Pudding Man of the Year in Cambridge, Mass., on Friday. "Just like at home, honey," the comedian joked to his wife, actress Christine Taylor, as he donned the blonde wig and bra. 04 of 13 RECIPE FOR SUCCESS Zxing/Snap-pix Reese Witherspoon and Jennifer Garner have a girls' day out in Santa Monica on Friday. The ladies, who lunched at Blue Plate Restaurant, bonded last year when they traveled together to New Orleans to aid displaced Hurricane Katrina victims. 05 of 13 TIGHT BOND neill j. schutzer/Ramey Before the whirlwind of the Oscars, Nicole Kidman and Keith Urban have a quiet night out at Beverly Hills restaurant Mr. Chow on Friday, where the couple joined fellow Aussie pals Rupert Murdoch, Hugh Jackman and former Disney head honcho Michael Eisner for dinner. 06 of 13 HARD TO HOLD Theo Smit/ WENN Newly single Hugh Grant finds himself unexpectedly attached to a new woman – Dutch journalist Cielke Sijben – who handcuffed herself to the star Friday at the Amsterdam premiere of his film Music and Lyrics. File this under "Don't Try This at Home": After firefighters released Grant, Sijben was arrested for the stunt. 07 of 13 RIGHT TO BARE ARMS Steve Dennett /Splash NEws Justin Timberlake shows off his secret weapon – a perfectly toned arm – before heading off for a round of golf while in Tampa, Fla., on a tour stop Friday. Why not celebrate? The singer's "What Goes Around, Comes Around" earned him his third No. 1 spot on the charts from FutureSex/LoveSounds the previous day. 08 of 13 HIGH WATTAGE Ray Nichols/ Splash News Taking a break from the New York City chill, Naomi Watts basks in the warm Miami weather by checking out some sparkly baubles at jeweler David Yurman's store on Thursday. Hopefully she got a discount: The actress is a celebrity spokesmodel for the jeweler. 09 of 13 DOS AMIGAS Jeff Vespa/WireImage Best Actress Oscar nominee Penélope Cruz (for Volver) takes a moment away from her new constant companion Orlando Bloom to pair up with Melanie Griffith at the Entertainment Weekly pre-Oscars bash in Beverly Hills on Thursday. Griffith, a past Oscar nominee herself (for 1988's Working Girl), hosted the evening with her husband (and Cruz's fellow countryman) Antonio Banderas. 10 of 13 PICTURE PERFECT Alex Berliner/BEI Naomi Campbell and Terrence Howard – who are rumored to be dating – get close during artist Damien Hirst's opening at the Gagosian Gallery in Beverly Hills on Thursday. Courtney Love, Kirsten Dunst and Petra Nemcova also checked out the exhibit. 11 of 13 BIRD OF A FEATHER Fame Pictures Looking like she's ready to audition for Dreamgirls 2, Mischa Barton shows off another one of her daring fashion choices while waiting for her car at a Los Angeles hotel on Thursday. 12 of 13 LUCK OF THE IRISH alberto rodriguez/BEI Dublin-born actor Stuart Townsend and his longtime leading lady Charlize Theron pay homage to his native country Thursday at the Oscar Wilde: Honoring Irish Writing in Film event in L.A. Musician Van Morrison and screenwriter William Monahan, an Oscar nominee for Best Adapted Screenplay for The Departed, were among the evening's honorees. 13 of 13 BEST FOOT FORWARD Jack Ludlam/Splash News Hilary Swank steps out for some fresh air in London's Soho neighborhood in between interviews to promote her film Freedom Writers on Thursday.