Emma Stone and Jimmy Fallon engaged in an epic lip sync battle on last night's episode of 'The Tonight Show' (April 28). She wished him "not good luck" before his first song and from then on out, it was ON! Clearly, the flame-haired actress was not messing around. 

Of course our first curiosity was if Emma would select a Spice Girls song to lip sync to, given the fact that her love of the Spice Girls became the stuff of legends during her promo rounds for 'Spider-Man.'

Fallon went first and rapped Iggy Azalea's 'Fancy' with a few, well, fancy dance moves sprinkled throughout. He had groove.

Stone admitted she was impressed as she launched into Blues Traveler's song 'Hook.' She got into it with her emotive facial expressions. She owned it with the vocal rapid-fire parts, too.

The round definitely went to Miss Stone.

Fallon reprised with Styx's 'Mr. Roboto.' His version was equipped with robot-like dances. He joked that he didn't understand how he was out of breath from a lip sync routine, when he really didn't do much!

Stone followed up with 'All I Do Is Win' by DJ Khaled. And with that, Emma Stone was declared the undisputed winner.

We're still totes shocked that she didn't pull out a Spice Girls song and give it a whirl, since those are her jams.

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