09/02/2010 at 04:00 PM EDT
, breaking a sweat at David Barton Gym in N.Y.C. The reality star was there for a Svedka Vodka-sponsored event where she learned how to do different exercises, including the Bot Lunge. Plus, she was treated to a special training session with Barton himself. Despite the healthy pursuit, Wilkinson couldn't help but ask when it was cocktail time after arriving at the gym, a source says.
How is Rafael Nadal preparing for the US Open
? By grooming himself, apparently. The tennis star stopped Julien Farel's Style Suite in the VIP area of Arthur Ashe Stadium in New York for a pre-game haircut – and the Spanish stud cut about 2 or 3 inches off. Way to beat the heat!
and DWTS alum Mya
were showing off their dance moves during a private performance of Robin Antin's Pussycat Dolls Revue at the Viper Room in L.A. Carmen Electra
also strutted her stuff (to the Pink Panther
theme) during the 30-minute performance, while Sharon
and Jack Osbourne
cheered from a booth with Kim Kardashian
celebrated his 27th birthday with his brother Brandon
and a group of guys at Lavo in Las Vegas, though his girlfriend Avril Lavigne
couldn't make it for the weekend. (She was recording a new album, a source says.) The group began the weekend with an Italian feast – including a supersized Kobe meatball and plenty of pasta – before moving the celebration at Tao Beach, where Jenner chilled out with frozen margaritas.
By ELAINE ARADILLAS, KRISTIN BOEHM, ANDREA DESIMONE and MELISSA LIEBLING-GOLDBERG