Girls Aloud star Nadine Coyle regrets ending her relationship with Desperate Housewives star Jesse Metcalfe-- insisting her behavior was "selfish." The Irish singer believes she overreacted upon seeing the actor photographed with another girl.

Coyle admits she still feels guilty for abandoning the star while he was receiving treatment for an alcohol addiction at a rehab center in Los Angeles earlier this year.

The 22-year-old says, "It was hard - he was in rehab. We were just about to go on tour. I was selfish, I have to say. I really hurt Jesse over that whole situation and I've regretted it since."

(This news article provided by World Entertainment News Network)