We all know Mary J. Blige preaches no more drama…
But girlfriend can't seem to get it out of her life!
Mary J. is being sued for allegedly bailing on a Dallas concert last December.
In the lawsuit filed by Vision Entertainment Worldwide, the promotional company is claiming the singer agreed to perform, but cancelled days before to appear at Brooklyn's Barclays Center with Mick Jagger and The Rolling Stones.
The best part?!