On March 27, Mena Suvari, Krysten Ritter (pictured) and Kate Mara, along with her boyfriend, Ivan Sergei, celebrated Treesje’s Spring 2010 Collection at Saks Fifth Avenue in Beverly Hills with designers Laura Darrah and Sheila Nazarian.

On Friday night, Robin Thicke hosted his official concert after-party at BUTTER NC, following his concert at the Fillmore Theater at the NC Music Factory in Charlotte, NC.  Thicke was joined by friends, including Charlotte Bobcats’ Raymond FeltonBob Johnson and BUTTER NC owners Richie Akiva and Scott Sartiano, who toasted the singer as partygoers danced to music by DJ Vikas.

The Black Eyed Peas celebrated their performance at Kansas City’s Sprint Center with a post party at Lucky Strike Lanes & Lounge Kansas City.  Taboo and Apl.De.Ap took the stage to perform some sets for the crowd.  Will.i.am hung out with Ludacris in the VIP section.

Emillie De Ravin promotes Remember Me wearing 1020 by Nicole Leather Jackets.  She wore a 1020 by Nicole “Shortie” Leather Jacket and the Leather Hoodie with Hand Knit Trim in Sailor (Navy).

Jamie Foxx and Usher drinking Crystal at Guys and Dolls in West Hollywood with a large group of friends.

Eve sipping a Bustelo Cool before going on stage to perform at Perez Hilton‘s 32nd birthday party at Paramount studios in L.A.

Nick Cannon beating Justin Bieber at bowling then fueling up on CRUMBS cupcakes during the “Bowling with Bieber” record release party at Lucky Strike in L.A.

Chace Crawford shopping for new jeans at the Diesel store on Melrose Place.

Kate Hudson having an Ahi tuna burger wrapped in lettuce instead of a bun at LGO in Santa Monica.

Joe, Kevin and Nick Jonas ordering rounds of root beer floats for their friends at XIV in West Hollywood.

Kris, Kendall and Kylie Kardashian preparing three yummy dishes using America’s Test Kitchen: Let’s Get Cooking on a Nintendo handheld as their guide.

Matt Damon having dinner with Luciana at Stanton Social in NY.

Dancing with the Stars‘ alums Karina Smirnoff and Stacey Kiebler catching up at the Yotam Solomon FW2010 Fashion Presentation in L.A.

Selita Ebanks and Serena Williams sipping Cointreau cocktails at the Ocean Drive magazine cover party at Wall at W South Beach.

John Cusack spotted sitting ringside at Golden Boy’s Boxing After Dark fight at The Joint inside Hard Rock Hotel & Casino.

David Hasselhoff shopping with his daughter Hayley at the alice + olivia by Stacey Bendet store in The Malibu Lumberyard.

Karina Smirnoff wearing a Natalia Romano dress at The Last Song premiere in L.A.

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