Last week’s South Park episode “The Cissy” revealed that Lorde was actually Stan’s dad, Randy Marsh, living a double life as a female geologist. It culminated in the debut of “Push,” a song featuring the notable hook “Ya Ya Ya/I am Lorde/Ya Ya Ya/I am Lorde.” When the pop star got wind of the tribute, she expressed her approval and even sang a bit of it in an interview. Now South Park has released the full song, which reportedly features Sia on vocals. It does sound like Sia, but she hasn’t commented on it. Listen below.