What is the name of this song?

I was in a store yesterday and I heard a song on the radio, very familiar to me, but I forgot the name. It was a female singer, sounded kinda like Avril or Kelly Clarkson, and the lyrics at the beginning of the chorus were "You were everything to me" very high up when she hits the first part of everything, As I said, a popular song that could be played on the radio. Please help! :D