The SINCE U BEEN GONE singer fell for Colton when his group, the GRAHAM COLTON BAND, were picked to support her on tour in America last year (05) and the couple were even talking about marriage at Christmas (05).
According to one of Clarkson's friends, the singer was hoping Colton would propose to her on her 24th birthday in April (06), but now the romance is over.
And when asked who her ultimate valentine would be, she says, "Steven Tyler! He's yummy! I've met him a couple of times - he's beautiful. He totally lived up to my expectations."