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

Lady Gaga and Kendrick Lamar's lost collaboration "Partynauseous," which was reportedly set to be on Lamar's major label debut good kid, m.A.A.d city, has leaked. "Partynauseous" sees more subdued pop fare from Gaga, who sings the hook alongside two new verses from Lamar. It's unclear whether the leaked version is the scrapped final track or just a demo from their sessions.