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Photo by Andrew Toth/Getty Images for FIJI Water

Vin Diesel is hands down the best part of the “Guardians of the Galaxy” press junket.

Not long after he spilled that Iggy Azalea will cameo in “Fast & Furious 7,” the down-for-anything star agreed to a little mid-interview karaoke.

Diesel took his best shot at Sam Smith’s “Stay with Me” for the U.K.’s Capital FM, and let’s just say if they ever make a “Fast & Furious” musical, he probably shouldn’t wait around for a phone call.

He gamely alternates between going high and low, and when it’s all over, he joked, “I don’t know how I did that.”

We don’t either, but we’re sure glad he did, and it’s obvious now that he’ll truly do anything to fill more seats.

And it appears to be working out well, since “The Hollywood Reporter” predicts that the film will take away at least $65 million this weekend in North America.

If acting doesn't work out, he also has same serious dancing chops as a reliable back-up.

Check out his hilarious video for yourself and tell us what you think of Vin Diesel’s vocal stylings in the comments!!