"I invited her to stay with me, and she was like, ‘No go,’" DeGraw joked.
"I love it here, though" Caillat said. "I’m having a lot of fun in Nashville, and writing with some amazing musicians and friends, and I look forward to coming back a lot more."
"We Both Know" will be featured in the upcoming film "Safe Haven" starring Josh Duhamel and Julianne Hough. DeGraw and Caillat also teamed up for a duet of "Baby, It’s Cold Outside" on Callait’s new holiday album, "Christmas in the Sand."