Britney Spears has laughed off reports she's relaxing in an Arizona rehabilitation facility by returning to her pre-Christmas partying. The singer reportedly checked into the Sanctuary clinic on New Year's Day (01JAN07) after hosting a New Year's Eve party in Las Vegas. Spears' handlers denied the story and last night (03JAN07) the fun-loving TOXIC singer was spotted out on the town in Los Angeles. Spears dined at Ashton Kutcher's restaurant Dolce before partying with friends at nightclub Les Deux.