Céline Dion has teamed up with an unlikely star for her brand new song: Deadpool.

That's right, the Marvel Comics character who is returning to theatres this month with the sequel, Deadpool 2. Dion's latest song, "Ashes," is from the film's soundtrack and in the music video released today, Deadpool jumps onstage to dance as the Canadian icon performs the piano ballad.

"That was the most beautiful performance I've ever seen in my life," Deadpool tells Dion at the end of her performance. But, the superhero had something different in mind. "This is Deadpool 2, not Titanic. You're at, like, an 11. We need to get you down to a five, five-and-a-half tops. Just phone it in." Dion, being the perfectionist she is — she does have one of the biggest soundtrack hits of all time, after all — did not respond well to that feedback.

Watch the full video below and watch Dion tell Deadpool, "Beat it, Spiderman."

More to explore:

The essential Céline Dion: CBC Music's guide to her best songs

Shania Twain will host the 2018 CCMAs

Prism Prize top 10 revealed: Feist, Grimes, Leonard Cohen up for grand prize