Petra NemcovaSupermodel Petra Nemcova is reportedly worried about the state of her relationship with James Blunt after he backed out of a charity event at the last minute in favour of working on his new album.

James had planned to accompany Petra to The Next Model party she was hosting during London Fashion Week to raise funds for tsumnami charity the Happy Hearts Foundation - but then cancelled.

A source told the Sunday Mirror: “Petra has been really upset because James told her that he would definitely be there.”

“But then he changed his mind and told her he had an important recording to do in Ibiza.”

“Petra now feels that he is putting his career before her party - proceeds were going to her charity, the Happy Hearts foundation, which helps victims of the tsunami.”

“It means so much to her. She understands that James is one of the biggest pop stars in the world - but she really wants him to spend more time with her. She’s worried they won’t last if they don’t see more of each other.”