Underwood co-wrote "Hate My Heart" for Denim & Rhinestones
with her regular writing partners David Garcia and Hillary Lindsey, plus Hardy
. Garcia contributed to 11 out of the album's 12 tracks and Lindsey eight, but country rock singer-songwriter Hardy is a newcomer to the star's writing team.
"He definitely has just such a cool way of writing that I've respected since the first time I heard some of his stuff that he had written for other people and even some of his own things as an artist that he does," said Underwood of Hardy. "You can immediately tell that he has a special way of saying things. He definitely was a super strong presence in the room that day. We just had a blast writing this song. I feel like it came out very easily."