From 2 dope Boyz:

Rumors were hitting the internets that a certain Canadian emcee would be featured on Rihanna’s new single. Doesn’t look that way does it? She actually turned to Ne-Yo to write and produce the first offering from her upcoming album Rated R, dropping November 23rd.

DOWNLOAD: Rihanna – Russian Roulette | Mediafire

Edited:
Loyal reader Lee Lee over at Compound Entertainment (Ne-Yo’s label) writes:

This is LeLee over at Compound Entertainment. Rihanna’s new song “Russian Roulette” was written by Ne-Yo and produced by Chuck Harmony for Compound Entertainment.