NEW AUDIO: Listen To Rihanna & Chris Brown’s Duet ‘Turn Up The Music!’

Rihanna and Chris Brown are back on — professionally at the very least.

Following last week’s Twitter exchange between the exes — initiated by Brown when he wished Rihanna happy birthday — the pair are now collaborating on two remixed singles: her song “Birthday Cake” and his song “Turn Up the Music.”  The collaboration comes three years after Brown assaulted Rihanna in a car in L.A.’s Hancock Park neighborhood.

Brown’s first line in Birthday Cake? “Girl I wanna f*** you right now. Been a long time, I’ve been missing your body.”

Meanwhile, Rihanna tweeted a link to “Turn Up The Music” Monday. Listen to it below:


Chris Brown Wishes Rihanna Happy Birthday!

They just can’t move on from each other!

On Monday, when Rihanna turned 24, her ex-boyfriend Chris Brown — who assaulted her three years — tweeted “HAPPY BIRTHDAY ROBYN!”

A few hours later, Rihanna tweeted “Thanks!”

A source tells Us, “Rihanna loves to live dangerously…Talking to and hooking up with Chris is all part of that.”  A rep for Brown also told Us, “He and Rihanna are just friends.”

NEW PRE-GRAMMYS PHOTOS! Grammys Gift Lounge…LL Cool J, Afrojack, Stephanie Seymour…

LL Cool J attends the Grammy Gift Lounge during The 54th Annual Grammy Awards at Staples Center in L.A. (Araya Diaz/WireImage)

Chris Brown and LL Cool J are among the stars who’ve already headed to the pre-Grammy gifting suites and stocked up on swag.

Thr pair visited the New Era Caps suite at the Grammys Gift Lounge, presented by LASIO Professional Hair Care, along with Chris Brown, Paris Hilton‘s deejay beau Afrojack (pictured below) Celebrity Apprentice‘s Aubrey O’ Day (pictured below), couple Daryl Hannah and Rami Jaffee (pictured below), DJ deadmau5 (pictured below),  and Jane Seymour and her son (pictured below) and Mark Foster and Sean Cimino from the band Foster The People.