Rihanna and Chris Brown together again.

Two songs featuring Chris Brown and Rihanna hit the Internet on Monday.

Chris is singing on the (NSFW) remix of Rihanna's track "Birthday Cake," and she's on the remix of his upbeat tune "Turn Up the Music."

ENJOY Chris Brown's first verse on "Birthday Cake":  "Girl, I wanna f**k you right now/Been a long time, I've been missing your body."

Subtle.

(Chris admitted assaulting then-girlfriend Rihanna at a pre-Grammy Awards party in 2009. He's serving five years of probation for the felony attack.)