Pop princess Britney Spears should quit partying and get back to work - according to Donald Trump. The business mogul believes the singer is wasting valuable time and letting her star fade, when she should be masterminding her comeback. Trump tells gossip site The Scoop, "She wants some free time but now, Britney, it's time to settle down and get back to work. It's time to get back to being a mother and being a star."