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."