Photo agency X17 reports that the love affair between Britney Spears and her part-time model boyfriend Isaac Cohen is officially over. Last night around 8 pm, Britney went to a Coffee Bean in Santa Monica with two friends. As she headed back to her car, Britney told us that she and Isaac are "not together, by the way." What's it been now, less than a month?! ... X17 Here they are in happier minutes in their relationship.