A Hilton Sister Sandwich

Paris Hilton and younger sister Nicky sandwich hair colorist Michael Boychuck at the grand opening of Color – A Salon by Michael Boychuck at Caesars Palace on Tuesday (New Year’s Day) in Las Vegas, Nevada.

The 26-year-old hotel heiress took time out to sign a poster-size naked image of herself–the ad was for her new line of champagne-in-a-can from German company Rich Prosecco.

Paris turned some heads over the weekend when she was spotted mingling with Britney Spears‘ ex, Kevin Federline at a pre-New Year’s party at Pure Nightclub in Las Vegas. The pair reportedly took the party back to Paris‘ room after leaving the club. Paris hosted a New Year’s Eve party LAX while K-Fed hosted one at Tangerine.

30+ pictures inside of a Hilton sister sandwich…