VIDEO : Lady Gaga and Kendrick Lamar's 'Partynauseous' Leaked

Lady Gaga and Kendrick Lamar's lost collaboration "Partynauseous," has leaked. The song is supposed to be on Lamar's major label debut good kid, m.A.A.d city.
In "Partynauseous", Gaga sings the hook alongside two new verses from Lamar. The beat and the rapper's flow are similar to Lamar's "Swimming Pools (Drank)." It's unclear whether the leaked version is the scrapped final track or just a demo from their sessions, and A representative for Lady Gaga won't comment on the track.