They may or may not star together in a remake of Grease, but Justin Bieber and Miley Cyrus most definitely took to the stage last night at Madison Square Garden…

… to the shrieks and cheers of those in attendance.

The star-studded concert was headlined by Bieber and filmed for his upcoming 3D biopic. Usher, Ludacris and Boyz II Men also joined the 16-year old sensation at various times. But the main attraction was Justin and Miley, who combined to sing “Overboard,” a monumental performance you can view now:

Tweeted fellow guest artist Sean Kingston: “Tonight Was #HISTORY  !!!!!! MSG IN NYC SOLD OUT ME USHER, LUDACRIS MILEY CYRUS AND LAST BUT NEVER LEAST BOYZ II MEN!!!!! I Had A Great Time.”

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