Couples Watch: Halle & Olivier's Sweet Snuggle in Vegas

Halle Berry and Olivier Martinez

� Halle Berry and beau Olivier Martinez cuddled up at the grand opening of Las Vegas's Nikki Beach inside the Tropicana. Though the theme of the party was white, Berry wore a brown dress. (Martinez's white button-up shirt fit the theme, though!) The duo sipped champagne in a VIP area of the club as they watched fireworks and live music performances in the new venue.

� Scott Disick celebrated his 28th birthday at Gallery Nightclub inside Planet Hollywood Resort & Casino ? and he enjoyed champagne with longtime girlfriend Kourtney Kardashian and some close friends. The couple looked excited and laughed when Disick's birthday cake presentation began. (A troupe of feather-waving dancers brought up a lavish cake from Sugar Factory.) After dessert, the two wasted no time dancing and enjoying their evening with friends.

� Christina Aguilera and boyfriend Matt Rutler grabbed a table near the deejay booth at new L.A. nightspot The Beverly. The singer had two bodyguards in tow, as well, and was in an upbeat mood, giggling and dancing in her seat to the tunes before getting up to dance more. Aguilera also made time to snuggle with Rutler for a bit before heading out just 15 or 20 minutes after arriving at the club.

� Nicole Kidman and hubby Keith Urban are workout buddies! The duo stopped by an Equinox gym in New York to take Kristin Kenney's cycling class together.

� Johnny Knoxville and his pregnant wife Naomi checked out the VIP preview night of Tim Burton's exhibit at the Los Angeles County Museum of Art. Knoxville kept his arm around his wife as he guided her through the museum. The Jackass star mingled with fellow museum patrons, including one man with a baby, and also paused to snap pictures on his phone of some of Burton's sculptures. The couple also stuck around to catch a surprise performance by Jane's Addiction.

� By JENNIFER GARCIA, MARK GRAY, CHARLOTTE TRIGGS & JESSICA WEDEMEYER

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