Last year, American rapper Lil Wayne ranted on several occasions about Cash Money and saying he wants out but now sources are saying Birdman says ‘a contract is a contract’ and Lil Wayne will have to take him to court if he wants to leave Cash Money.

Birdman and Lil Wayne have officially declared war according to a report by gossip site TMZ. Settlement talks have broken down and Wayne will now sue his mentor, claiming among other things Birdman owes him $8 million.

The two titans tried coming to terms this week but it wasn't meant to be. Now, Wayne will ask a judge to declare him free of Cash Money and Birdman's control. Wayne says Birdman has violated their contract by withholding the release of his new album "Tha Carter V."

As for the $8m claim, Wayne says Birdman owed the money for his latest album -- it was supposed to be an advance.

Birdman has held the record label firm and will release the album "in due time," but clearly that's not good enough for Wayne.

TMZ are told Wayne will keep recording but he will release his works outside of the Cash Money umbrella.