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.