Dr. Dre's Ex-Fiancée Michel'le -- He Gave Me 5 Black Eyes!

The ex-fiancée/baby mama of hip-hop legend Dr. Dre claims he used to beat her on the regular ... and gave out a laundry list of her injuries for the world to hear.

Michel'le -- an R&B singer who now appears on the show "R&B Divas: Los Angeles" -- was a guest on "The Breakfast Club" Friday morning, when the topic turned to Dre.

She didn't hold back -- and while Michel'le's made similar allegations before ... this time she added details about scars and broken bones.

We reached out to Dre's people ... they had no comment.