I Want You Back is rated R by MPAA for partial nudity among other things.
Jenny Slate, who stars in the movie, has a habit of doing nude scenes in which she’s naked filmed from the back. We’ll see, if that’s the reason for the partial nudity tag.
Movies to be released in theaters this week:
Death on the Nile 
(
Susannah Fielding,
Sophie Okonedo,
Emma Mackey,
Annette Bening,
Rose Leslie,
Dawn French)
Blacklight (
Emmy Raver-Lampman,
Claire van der Boom,
Yael Stone,
Georgia Flood,
Caroline Brazier,
Mel Jarnson)
Marry Me (
Jennifer Lopez,
Sarah Silverman,
Jacqueline Honulik,
Katrina Cunningham,
Christine Jones)
What About Love (
Sharon Stone,
Rosabell Laurenti Sellers,
Marielle Jaffe,
Sara Lazzaro)
The Devil's Light (
Virginia Madsen,
Jacqueline Byers)
The Amazing Maurice (voices:
Emilia Clarke,
Gemma Arterton)
Those Who Walk Away (
Scarlett Sperduto)
New VOD releases:Supercool (
Madison Davenport,
Iliza Shlesinger,
Kira Kosarin,
Madison Bailey)
Those Who Walk Away (
Scarlett Sperduto)
Worst to First [doc] (self:
Joan Jett,
Deborah Gibson,
Taylor Dayne)
Catch the Fair One (
Lisa Emery,
Tiffany Chu,
Isabelle Chester)
I Want You Back 
(
Jenny Slate,
Gina Rodriguez,
Clark Backo,
Isabel May,
Quinn Cooke,
Jami Gertz)
A Week in Paradise (
Malin Akerman)
Indemnity ()
Ronnie's [doc] ()
Here Before (
Andrea Riseborough,
Gina Moxley)
Trouble Sleeping (
Vanessa Angel)
Gridlocked: On Tour with the Briggs [doc] ()
Krasnyy prizrak ()
Flee the Light ()