BRIT & ISAAC UPDATE! THEIR NIGHT OUT AT L.A. CLUB!

On Thursday evening Britney Spears was telling photographers that she and her new beau, model Isaac Cohen, were "not together," but as Star first reported, Isaac thinks they are very much on! In a candid interview on Friday, he insisted to Star, "everything is fine."

And just a few hours later, on Friday, Britney and Isaac, both 25, visited a recording studio in Hollywood and hours later arrived--separately--to hip nightclub Cabana Club in Hollywood. "They were definitely together all night," a source tells Star. "But what was weird is that they left together. At 3 a.m. Isaac walked Britney out to her car and said goodbye and she drove off."

Britney was dressed in the same jeans she was wearing the day before, but this time paired them not with an Ed Hardy jacket but a sexy black silk camisole. What was unusual is Brit did not look disheveled or drunk--her hair was well groomed and she seemed sober and tranquil, "like she was in a Zen like state," says the source. Isaac was sporting his signature look--a hoodie and that heavy beard.

"They seemed like they were in an OK mood, it was hard to tell," says the source. "Isaac is a mellow guy, maybe it is rubbing off on Britney! They were both a bit quiet and reserved."

Keep logging-on to StarMagazine.com for breaking updates on Britney's bizarre love life!

— HEIDI PARKER