If there were any doubts that the high-energy 'Bang Bang' would be a showstopper at the 2014 American Music Awards tonight (Nov. 23), all such fears were forgotten the second Jessie J confidently cat-walked in a gold catsuit through the crowd from the back of the floor to start the song.

She fearlessly delivered her smash hit to the assembled A-listers, bumping booties with Jennifer Lopez and shaking her stuff with the likes of Taylor Swift and Lorde. The audience was eating from her hand -- and they hadn't even seen or heard from collaborators Ariana Grande and Nicki Minaj yet!

Ariana was up next, singing sexily from a chair while wearing a super-short and super-shiny gold outfit. Not long after, a similarly clad Nicki joined in, spitting her signature split-second rhymes. Jessie and Ariana continued their vocal fireworks while the screens simultaneously showed colorful pyrotechnics. All were equally hot!

See Photos of Celebs on the 2014 American Music Awards Red Carpet