But the duo - plus Jessie J - reconvened for their big-name collaboration "Bang Bang," featuring all three on their own verses. After Jessie threw it down with the first verse and a shortened chorus, Grande jumped in to a large round of applause - any doubt who might have the more rabid fanbase of the two? - before both traded off on the chorus, occasionally showing off some powerhouse vocals by deviating from the melody only slightly.

Then there was Minaj, who came in with a microphone headpiece - possibly a good thing, because with the way she had her arms wrapped around her torso, there might have been a wardrobe malfunction imminent.

"Bang Bang" is the first single off Jessie J's upcoming album Sweet Talker, out Oct. 14. The song is also included on Grande's My Everything, which hits stores next week.

Watch it - here.

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