Stephanie Pratt hanging out at The SuperModels Unlimited Party at Avalon in Hollywood sponsored by YMI Jeans.
The Kings of Leon toasting the Grammys at the Belvedere IX Lounge at Teddy's in Hollywood.
Paris Hilton picking up Sanctuary duds for herself and her sister Nicky in Park City, Utah.
Kate Mara picking out Rebecca Jewelry online via Giiv.com at the Talent Resources gift suite in Park City, Utah.
Ashley Tisdale getting a brazilian straightening treatment by Dani H at the Byron and Tracey salon in Beverly Hills.
Malin Akerman chatting with The Humane Society of the US about all of her rescue pets at the Sundance Film Festival in Park City, Utah.
Ben Stiller dining with friends at Nove Italiano inside the Fantasy tower at the Palms Casino Resort in Las Vegas.
Jon Gosselin scoring an AMC VIP movie pass at a gift lounge in Park City, Utah.
Joan Rivers and Katie Lee Joel toasting celeb event planner Preston Bailey at his book launch at The Armory in NYC.
Adam Lambert rocking the G-Tie to Clive Davis' pre-Grammy party in L.A.
Lindsay Price dancing to DJ Reach at LAVO nightclub in the Palazzo hotel in Las Vegas.
Joey Fatone and Lance Bass taking the stage for an hour at Sopranos Piano Bar in St. Maarten.
Kobe Bryant and L.A. Lakers Coach Brian Shaw hanging with friends at Whiskey Park in NYC.
Jay-Z listening to DJ Vice's tunes over brunch at The Foundation Room in L.A.
Nicky Hilton dancing along as Taryn Manning deejayed the ML Creative Group/Primary Wave pre-Grammy party at SLS hotel in Beverly Hills.
Tim Gunn celebrating the relaunch of Dearfoams slippers at Openhouse Gallery in NYC.
Lauren Conrad enjoying a giant Crumbs red velvet cupcake at her birthday party at the Hollywood Roosevelt hotel.
Nicole Scherzinger chatting with John Legend in the Bacardi VIP Lounge at the Black Eyed Peas Dipdive Event in L.A.
Renee Zellweger shopping for toys at Cozy's Cuts for Kids in NYC.
Sign up now for the Us Weekly newsletter to get breaking celebrity news, hot pics and more delivered straight to your inbox!