.

Brown says he's lucky that Rihanna forgave him

Chris Brown's reflecting on his relationship with his girlfriend, Rihanna. 

They resumed their on-off romance last year, after claims he physically attacked her ahead of the 2009 Grammy Awards. 

Chris says he's lucky that Rihanna forgave him - and he's eternally grateful.

He also says that incident in 2009 was the worst time of his life - now he's working on being the best he can be.