Play video content EXCLUSIVE "You" feat. Liam Payne by Juicy J & Wiz

Liam Payne's shaking off his boy band roots by hooking up with Wiz Khalifa and Juicy J ... and the result is way more Timberlake and Jay Z than anything One Direction ever did.

TMZ's obtained the new track called, "You" -- one of 5 Liam's laid down with producer TM88 (from 808 Mafia) and Juicy J -- and you'll hear the 1Der singing the hook.

As we reported back in January, Liam's got flow too ... we're told you'll hear him rapping, as well as singing, when his solo album drops.