Drake and Future are being sued for $25 MILLION by a woman who claims she was raped at their concert by a man associated with the venue.

The woman says she attended the duo's show at the Bridgestone Arena in Nashville last August.  The woman claims she was approached by a man associated with Bridgestone Arena who told her he'd take her backstage to meet Drake and Future.

The woman says she followed the man -- identified as Leavy Johnson -- who then allegedly violently attacked her, causing severe physical and psychological injury. According to The Tennessean, Johnson has since been arrested and charged with rape and is awaiting trial.

Johnson had outstanding warrants for assault at the time of the alleged attack. She says Drake, Future, the arena and multiple others should have known that employing Johnson had the potential to cause a dangerous situation for others.

We've reached out to Drake and Future... so far, no word back. A rep for the arena had no comment.