Jennifer Lopez Teaches Shakira to Butt Jiggle In New Super Bowl Rehearsal Video

Here's Jennifer Lopez giving Shakira a "SHAKE THAT ASS" lesson during a private Super Bowl halftime rehearsal ... and it's amazing!!!

"I do it with my knees," J Lo tells Shakira mid-gyration ... "If you shake your knees, your butt goes.

"My mother taught me that ... when I was four!"

WELL, THANK YOU, MRS. LOPEZ!!!

It's all part of newly released video Jenny from the Block decided to share with the world ... showing all of the hard work the team put in to make that INCREDIBLE halftime show from SB LIV back in February.

The footage is awesome -- and shows just how hands-on Lopez was with ALL of the dancers and performers, including Shakira!

"I can’t believe it’s already been 3 months since the #SuperBowlLIV#Halftime Show," Lopez said.

"So much has happened since then, but I wanted to share a fun peek behind the scenes at our first rehearsal with the dancers and @Shakira."

One of the moves they busted their asses to perfect was the end pose ... from the cake jiggling to the final ferocious head turn to the camera.