-- Sheryl Crow volunteering at a Salt Lake City, Utah park with TreeUtah volunteers as part of the launch of Tom's of Maine's new Simply White toothpaste.

-- Emmanuelle Chriqui unveiling her cover of Hamptons Magazine at a party presented by Baume & Mercier at South Pointe in Southhampton, NY.

PHOTOS: Charlie Sheen's controversial life

-- Charlie Sheen's #1 Goddess Bree Olson starting the party up at Ultra 88 nightclub immediately following the Rihanna concert at Mohegan Sun in Uncasville, CT.

-- Stephen Dorff taking home some goodies from Connected Kenneth Cole Reaction at the Wireimage Lounge during Comic-Con in San Diego.

PHOTOS: Celebrities at Comic-Con

-- Dominic Monaghan sipping pineapple juice at W Hoboken's Living Room Bar in New Jersey.

-- A newly single Kiefer Sutherland trying the risotto at AGO Restaurant in L.A.

-- Kellan Lutz hanging out with friends at Whiskey Blue’s W After Work Cocktail for a Cause event at W Westwood in L.A.

-- Bethenny Frankel braving the rain under a cabana with friends at David Burke Kitchen’s Urban Garden at The James New York for a screening of Tribeca Film Festival’s Bang Bang Club

-- Katie Lee sipping Clos du Bois wine at a celebration for her new novel, Groundswell, at NYC’s David Burke Kitchen.

-- Jeremy Piven celebrating his 45th birthday with friend and designer Domenico Vacca at a private estate in the Hamptons, NY.

VIDEO: Remember this wild Entourage scene?

-- Maria Menounos hanging at Chris Evans' table for the Captain America after party at Supper Club in Hollywood while enjoying Amstel Light throughout the night.

-- Ryan Reynolds and a group of friends dropping by the Flatt Magazine soiree held in the Jimmy at the James Hotel in NYC.

PHOTOS: Hot rebound romances

-- Dominic Cooper greeting guests at the door of his Peggy Siegal Company-hosted party for the new Lionsgate thriller Devils Double at the Top of the Standard in New York.

-- Heather Morris enjoying some authentic cuisine at Tides Zihuatanejo Resort in Mexico during a family vacation.

-- Sam Worthington dining with a female friend at the sushi bar of Koi LA.

-- Ron Artest listening to the music provided by DJ Price at AXE Lounge in Southampton, NY.

PHOTOS: Britney Spears through the years

-- The View’s Sherri Shepherd celebrating her bachelorette party with Niecy Nash and several other friends by laying on the beach at the La Samanna Hotel in St. Martin.

-- Mandy Moore buying clothes for her husband Ryan Adams at Alternative Apparel in Venice, CA.

-- Britney Spears singing along to the background music of Nashville's 107.5 The River while shopping in Gin-O with Jason Trawick and Jamie Lynn in downtown Franklin, TN.

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