Just how did country stars Miranda Lambert and Blake Shelton get together? The newest episode of VH1’s Behind the Music: Miranda Lambert—which will air on the cable network tomorrow, July 13, at 10 p.m.—tells the full story, and EW has the exclusive preview clip of the hour.

Behind the Music delves into Lambert’s relationship with Shelton, specifically how their attraction began during a simple duet while he was still married to his ex-wife. “He’s hilarious,” Lambert recounts, in the exclusive clip, which you can find below. “We had instant chemistry, just like messing with each other, and he’s real easy to be around.”

Lambert’s mother talks about the pair’s relationship, too, but it’s Shelton chiming in that’s especially juicy. “I’ve never had that kind of experience with anybody,” he remembers. “I was a married guy, you know? Standing up there and singing with somebody and going, ‘Man, this shouldn’t be happening.’ Looking back on that, I was falling in love with her, right there on stage.” Adds Lambert: “It was just like this draw to each other. It was just sort of this inevitable chemistry.”

Fellow country stars Loretta Lynn, Sheryl Crow, Kenny Chesney, and Lady Antebellum’s Hillary Scott also illuminate Lambert’s life via interviews for the show.

EW has the exclusive first look at the episode. Watch the full, exclusive preview video here:

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