— Kelly Osbourne and David Arquette partying at The Bank Nightclub in Las Vegas.
— Joey Fatone partying at the Playboy party at Prime in Louisville, KY.
— Good Charlotte's Joel and Benji Madden rocking out to a packed crowd at the Maxim/Cuervo Games in Scottsdale, AZ.
— Angie Harmon celebrating Mother's Day by picking up jewelry at Santa Monica Place with friend and celeb stylist, Cristina Ehrlich.
— Aubrey O'Day sipping Evan Williams Mint Julep at the Maxim and Black Rock Stables party in Louisville, KY.
— American Idol alums Jordin Sparks and Kris Allen rocking the house the night before the Kentucky Derby at The Mint Jubilee in Louisville, KY.
— Neon Trees playing their hit song "Animal" at Operation Smile's event at NYC's Cipriani Wall Street.
— Kate Gosselin picking up goodies at the Style Icon Luxury Gifting Suite at the Galt House in Louisville, KY.
PHOTOS: Kate Gosselin's meanest faces
— Chef Daniel Boulud standing on the bar of his own Boulud Sud during the afterparty of the James Beard Awards in NYC.
— Bruno Mars celebrating the launch of his Doo-Wops and Hooligans tour at 1Oak in NYC.
— AnnaLynne McCord and Kellan Lutz drinking 901 Tequila during a Cinco De Mayo party at Greenhouse in NYC.
— Julie Benz enjoying a custom blended tea by the Teaologist at the Galt House Hotel & Suites on her way back from The Oaks in Louisville, KY.
— Jake Gyllenhaal, Marcus Mumford and Carey Mulligan dancing to DJ Questlove's set in between their turns bowling at Brooklyn Bowl in New York.
— Jersey Shore's Angelina Pivarnick chatting with fans about Whirl-A-Style products and "Fashion-On-The-Go" hair styling services at a Duane Reade in NYC.
— Christina Ricci attending the Fourth Annual TV Academy Honors in Beverly Hills.
— Russell Brand spending Cinco de Mayo noshing on a veggie quesadilla at Lime Fresh Mexican Grill in South Beach, Miami.
— Maria Menounos stopping in the Keratin Complex by Sean Donaldson pop-up salon for a quick touch up during the LOEWS Miami Beach Girlfriend Getaway.
— Something Borrowed star Colin Egglesfield and his brother making a late-night stop at Chicago's beer centric hotspot Public House.
— Bethenny Frankel indulging in bibimbap and scallion pancakes at Woo Lae Oak in NYC's Soho neighborhood.
— Angela Martini overheard discussing her recent photo shoot for GQ Italia with fellow model Jessica White at Bar Pitti in NYC.
— Jay-Z hanging in the deejay booth with DJ Ruckus before taking the stage with Kanye West at the "MoMa Party in the Garden" in NYC.
— Christina Milian spending quality time with her mother Carmen and daughter Violet at the 3rd Annual On the Go Beauty by Joico event in L.A.
— Lil' Jon celebrating Cinco de Mayo with Don Julio Tequila at a private party in NYC.
— Eva Longoria enjoying Grey Goose vodka cocktails at a gala celebrating the Rally for Kids with Cancer Scavenger Hunt at Eden Roc Renaissance Miami Beach.
— Grey's Anatomy actress Ellen Pompeo and husband Chris Ivery dining at hotspot Zuma Miami.
— Jamie Lynn Spears chatting with Chef Kerry Simon during her dinner with her daughter Maddie at Simon restaurant of Palms Place Hotel in Las Vegas.
