Carrie Underwood and Chace Crawford have split, according to sources.

The American Idol winner, 25, and the Gossip Girl star, 22, had been dating since last July, but did not go public with their romance until October.

Underwood had spent Thanksgiving at his parents' home in Dallas and part of her Christmas break with his relatives.

An insider told sources in December, "His parents are fond of her... they believe 'Carrie Crawford' would be a great addition to the family!"

"She's a classy girl," Crawford told sources in October.

Rumors linking Crawford to buddy JC Chasez sparked Chasez to tell Kiss-FM 104.7 Wednesday, "For the record, we're both straight. We're not dating."

Underwood's rep was not available for comment; Crawford's declined to comment.