The song-and-dance number shows off Santino Fontana and Vincent Rodriguez III's tap skills.

Ex-boyfriends. Who needs them? Definitely not Rebecca Bunch (Rachel Bloom).

On Friday’s “Crazy Ex-Girlfriend,” Rebecca’s two exes get together for the song-and-dance number, “We Tapped That Ass,” that reminisces about all times and all the places, they made sweet, sweet love to her around her house. The routine offered Greg (Santino Fontana) and Josh (Vincent Rodriguez III) to show off some of their amazing footwork.

READ MORE: ‘Crazy Ex-Girlfriend’ Gives the Season 2 Scoop on Rebecca’s Delusions and More

“‘[We Tapped] That Ass”’is very much kind of a throwback to old Gene Kelly musicals. So we draw our references from all over and it sort of has to serve the joke,” co-creator Aline Brosh McKenna told a group of reporters at a screening for the episode. “And doing an old-school tap number like you would with Gene Kelly or Donald O’Connor, but having it be about tapping someone’s ass. That was a happy day in the writer’s room, when they figured out that ‘[We Tapped] That Ass’ was tap. That was a happy day… If you notice, there aren’t a lot of cuts in it, it’s a lot of wides, you see their feet. It’s not cut in an MTV way, it’s cut in a very classic way, so you can really see that they’re extraordinary dancers, both of them.”

Check out the exclusive sneak peek of “We Tapped That Ass” below:

“Crazy Ex-Girlfriend” airs Friday at 9 p.m. on The CW.

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