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We were all excited to hear "Partynauseous," the collaboration between Kendrick Lamar and Lady Gaga, on Lamar's October 22 release good kid, m.A.A.d. city. But it looks like we'll have to wait a little longer to hear how the Compton rapper will incorporate his street-centric rhymes into Mother Monster's singular universe. Gaga took to her website to explain why the song won't appear on Lamar's album after all.

"I apologize to the fans that this situation with Partynausous [sic] is confusing. To clear it up I must explain this. When I collaborate with an artist I work solely with them, not with their camps or management. Its [sic] purely organic and creative. I love Kendrick dearly as a friend, but was not willing to compromise musically to the changes his team was making to my music. This is why I am not [on] his record.

"I have a very specific vision as a producer and songwriter, and I always have. That song will be released at a different time, for a different project. I love you, and think you should check out his stuff because he is truly great. He's a good kid, its [sic] just sometimes a mad city."

Thankfully, Lamar's debut will contain "Compton," which Just Blaze told us was originally recorded for Dr. Dre's Detox. No word on when, or if, "Partynauseous" will surface but we're keeping our eyes and ears open.