Kate Upton says her ass is neglected ... badly neglected ... and now she's on a mission to help get it the "attention it deserves."
Your wish is our command.
Kate showed off her backside in a new video posted by Sports Illustrated in which she thanks S.I. for finally allowing her to shoot on a beach again ... after that whole frozen Arctic thing last year.
"I think S.I. likes me again," Upton joked.
The footage is incredible ... and features an assistant whose job it is to adjust Kate's bikini tops BY HAND if the material is covering too much hooter.