Michelle Obama, Usher, Sheryl Lee Ralph, Tina Knowles to name a few — have all caught a ride through this viral backstage ...

The concept is a lo-fi twist on the Soul Train line ... of exuberant staff members singing in the tune of "Yeah!" It's Keke Palmer, effervescent as usual, whipping her hair like she's Tina ...

“I know it ain’t Keke Palmer,” one of the crew members ... Obviously, the man who hosted "Soul Train" has plenty of rhythm, because Shemar Moore did not come to play when it was his turn ...