Petra Nemcova and James Blunt have called it quits on their relationship of just over a year. "They split in February. It's very amicable," says a source close to Blunt. The pair have not been seen publicly together since making the rounds at the Oscar parties last month. The You're Beautiful singer has been hitting the Hollywood club scene of late, hanging with fellow celebs Robbie Williams, Lindsay Lohan and Kelly Osbourne. Rumors have been circulating that Blunt and ...