Britney Spears's $40,000 Night in Vegas

Britney Spears and Isaac Cohen have taken their hookup to new heights: a Fantasy Tower suite at The Palms in Las Vegas.

Sources tell PEOPLE the couple stayed in the tower's $40,000-a-night, two-story Hugh Hefner Sky Villa on Saturday, where a Jacuzzi pool, a glass elevator, an 8-ft. rotating bed and a full bar are among the amenities.

"They seem very happy together," says a source who spotted the two, who started dating in the past month. Hotel officials had no comment.