The singer and the talk show host were discussing her and her country singer boyfriend's mutual love for music when Gwen admitted that he told her he "dated a girl for three months that had my face plastered over her whole bedroom." Awkward!
"So that's kind of weird, right?" the "Hollaback Girl" singer continued.
"You know what you ought-a do?" Jimmy asked the 48-year-old. "Find out what she looks like and plaster her face all over the wall!"
"Oh my god that's so gross!" Gwen laughed.
Blake and Gwen have been together since November 2015, but the couple aren't getting ready to wed. The Voice judge admitted when he stopped by CMT radio, that he thinks about it, but he doesn't think "it's any time soon."
Watch the hilarious clip above and let us know your thought in the comment section!