Be careful who you idolize: they just might become your partner's future girlfriend.

Gwen Stefani appeared on Jimmy Kimmel Live! Wednesday night (April 18), where she revealed that her boyfriend Blake Shelton once dated someone who had posters of her hanging up in her bedroom. (Awkward!)

"[Blake] did tell me that he dated a girl for like three months who had my face plastered over her whole bedroom," she explained to the late-night TV host. "So that's kinda weird, right?"

While Stefani didn't name names, it's likely that she was referring to one of Shelton's girlfriends from his younger years or when he was a teenager, which would make more sense that, say, his ex-wife Miranda Lambert.

As for Kimmel's advice for how Stefani should deal with that weird revelation, he told the "Hollaback Girl" singer to "find out what [Blake's ex-girlfriend] looks like and plaster her face all over your bedroom."

Watch the hilarious moment, below:

Stefani and Shelton began dating in 2015, after meeting on set of The Voice. They announced their relationship four months after Shelton and Lambert finalized their divorce.

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