AUSTIN, TX - MARCH 18: Erykah Badu poses for a portrait backstage at the Fader Fort by Fiat during the 2011 SXSW Music Festiv
Roger Kisby/Getty Images//Steven Dewall/Redferns

R&B singer Erykah Badu and Flaming Lips frontman Wayne Coyne are Heady Fwends no more. 

Badu is extremely irked at Coyne for releasing the controversial, NSFW and just plain gross video for their collaborative song, "The First Time Ever I Saw Your Face," without letting her approve it first.

The music video features Badu and her sister Nayrok, who sits in a bathtub and gets covered in a syrupy white substance. So... yeah. In her open letter, Badu said Coyne promised her she would have a chance to approve the video's content before its release. Instead, he just went ahead and put it online.   

"I told u from jump that I believed your concept to be disturbing," Badu wrote. "But would give your edit a chance. You then said u would take my shots… and Nayrok's part (which I was not present for but saw the photos and a sample scene of cornstarch dripping) and edit them together along with cosmic, green screen images then would show me the edit. Instead, U disrespected me by releasing pics and rough vid on the internet without my approval. (Contract breech)."

Aside from accusing Coyne of misleading her, she also took extreme umbrage with the artistic merit of the video and Coyne as a human being. 

"I never would have approved that tasteless, meaningless, shock motivated video," she wrote. "Just because an image is shocking does not make it art. You obviously have a misconception of who I am artistically. I don't mind that but... By the way you are an ass."

Served! For his part, Coyne doesn't seem too perturbed. On the contrary, he's reveling in the increased press. "You really know how to do it!" Coyne tweeted at Badu. "You hatin on me has gotten the video 100,000 more views!!! Love Love Love."

Even Coyne's wife jumped in on the Twitter fury, alleging Badu showed up six hours late for her part of the video shoot. Badu didn't mince words when responding to Michelle Martin-Coyne, either: "Hi was wondering when u were gonna sober up and say somethin. Your husbands an ass and u know it-tell the truth. Do not lie."

Moral of the story: If you make a music video with Erykah Badu, run it by her before releasing it. Especially when the content is visually repugnant, to say the least. Or she will demand you "kiss [her] glittery ass."