Keyshia Cole spent a not-so-pleasant Friday morning in jail ... after allegedly assaulting a woman who apparently spent the night with Keyshia's rumored BF.
Keyshia showed up at a swanky condo complex in West L.A. at around 5 AM. We're told she went there to see Birdman -- the CEO of Cash Money -- who she's reportedly dating.
Our sources say ... for some reason security let her go up to Birdman's penthouse and when she got in she saw another woman and went nuts.
We're told Keyshia attacked her ... leaving scratches all over her face.
Cops were called ... and Keyshia was arrested for battery and an outstanding reckless driving warrant.
She was just released on $46,000 bail.
We called Keyshia's rep ... so far no comment.