Lionel Richie's mocking Chris Brown and Usher's tour all night long ... claiming the two aren't doing anything groundbreaking on tour ... and bringing up Chris' ...

Michael Jackson's estate won a huge victory in court against four siblings who claimed the King of Pop raped and molested them as children ... TMZ has learned. A federal judge ...

Tyga's having a rough rollout for his latest album ... because Pitchfork just gave it an impressively awful 0/10 rating ... and it sounds like robots did him no favors. ...