After weeks of speculation, Twitter banter and endless "will they, won't they" moments, Hollywood power couple Rihanna and Chris Brown have reunited... Musicially, at least. 

Ahead of her performance at the BRIT Awards tonight (February 22, 2012), Rihanna has released the full version of her single 'Birthday Cake'. A much shorter version, coming in at 1 minute 18 seconds appears on her latest album 'Talk That Talk'. The new full version, also produced by Da Internz features ex-boyfriend Chris Brown. Cute for them.

You can listen to the full version of 'Birthday Cake' (feat. Chris Brown) right here.

It seems Rihanna couldn't get enough of Breezy as she returned the favour by appearing on the remix to Chris Brown's latest single 'Turn Up The Music'. Also cute for them. 

You can listen to the remix of 'Turn Up The Music' (feat. Rihanna) right here.

In related news, it's also been reported that Rihanna has begun work on her new album while here in London Town. On Sunday, February 19, Rihanna took to her Twitter account and said:

"Next stop, set up studio in a hotel room! I'll be turning 24 making mu$ic!!!

"That Rihanna reign just won't let up..."

http://www.twitter.com/Rihanna

http://www.twitter.com/ChrisBrown