Kendall Jenner: My Nipples Got Me a Gig at the AMA's!

There may be a little nip in the air at the American Music Awards Sunday ... TMZ has learned Kendall Jenner will be presenting.
The gig comes on the heels of the 18-year-old's very adult Instagram photo. 

We're told she'll be presenting Best Pop Rock album, and get this -- the nominees are Justin Timberlake, Taylor Swift and One Direction.  As you know, Kendall was out with Harry Styles this week -- so advantage 1D.
This is Kendall's first time making a big appearance without the Kardashian brood.
We're sure she'll bust out big.