How AnnaLynne McCord Stayed Hydrated at the Sundance Film Festival

 Michael Kovac/Yield Media LLC

AnnaLynne McCord stayed hydrated with Activate drinks at the Sundance Film Festival in Park City, Utah.

Lily Aldridge picking some Rich & Skinny jeans and Free Bird boots with her husband Caleb Followill at Madison Melrose in L.A.

Modern Family creator Steve Levitan drinking an Amstel Light at the SAG EIF after-party in L.A. while he partied with Sofia Vergara and Julie Bowen.

Adam Sandler seen shopping at Black Ink in Pacific Palisades, Calif.

John Mayer enjoying a meal at Cafe Montana in Santa Monica, Calif.

Adrian Grenier hosting a dinner at the SHFT, W Residences and Ford Sundance Lounge in Park City, UT.

Adrienne Bailon attending a screening of Ne-Yo's film Red Tails at the Secrets Resort in Montego Bay, Jamaica.

— Celebrity chef Todd English hanging at Avicii's House for Hunger tour benefitting Feeding America at LAVO in NYC.

Nicole "Snooki" Polizzi and Deena Nicole Cortese snacking on belVita breakfast biscuits while in NYC.

Kyle Richards being swarmed by men in suits asking for pictures as she checked into the Boca Raton Resort & Club the night before her book signing at Alene Too.

Kristen Bell using her trip to Sundance to spend some quality time skiing with fiance Dax Shepard while staying at the Waldorf Park City in Utah.

Jenny McCarthy, Carmen Electra and Jeremy Piven celebrating SVEDKA Vodka's Anti-Valentine's Day Bash at AGENCY, a boutique nightclub in Hollywood.

Tilda Swinton joining her boyfriend Sandro Kopp at a Belvedere-sponsored party at Pulqueria after an event honoring his work at the Lehmann Maupin Gallery in NYC.

Anne Hathaway enjoying a few rounds of margaritas during a night out with her friends at Mondrian Soho in New York.

— YouTube sensation Jessica Frech sharing a few laughs with famed comedian Tom Green in the greenroom at Fox's Good Day NY studios in NYC.

Viola Davis and Dean Cain having lunch and chatting about a possible new projects at the Avalon Hotel in Beverly Hills.

— Olympic gold medalist and Sports Illustrated model Hannah Teter celebrating her 25th birthday with Clearasil at the Sky Hotel in Aspen.

Katherine Heigl and John Leguizamo enjoying a dinner of tuna tartare and lobster tacos at NYC hot spot Beauty & Essex.

Deadmau5 and Tommy Lee puffing on South Beach Smoke electronic cigarettes while out and about in Park City, Utah.

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