Caught in the Act!
05/27/2011 AT 06:00 AM EDT
Before jetting off to Monaco with new fiancée Kim Kardashian, NBA star Kris Humphries partied at SkyBar inside L.A.'s Mondrian Hotel at the monthly Champagne & Caviar bash. Humphries held court with guy friends, while Ryan Phillippe was spotted near the bar with his pal Jesse Bradford and David Arquette bounced from table to table, mingling with friends.
Diddy sipped a namesake cocktail – the Diddy! – created especially for him at the Ciroc Cocktails with Jessica party inside New York's Hudson Hotel. The bash, which featured a customized cocktail menu, also drew out heavy-hitters in the music industry, as well as various deejays.
Rose McGowan stepped out for dinner with a male friend at West Hollywood's Chateau Marmont, where they were soon joined by two other guys outside on the patio. Despite the intimate setting, the group seemed boisterous at times, and McGowan would occasionally burst into laughter while sipping on wine.
KRISTIN BOEHM, JENNIFER GARCIA and DAHVI SHIRA