Jimmy Fallon has faced some stiff competition during his recurring lip sync battles, but the comedian faced his most formidable opponent during Monday's episode of The Tonight Show. Emma Stone, who appeared on the late-night talk show to promote The Amazing Spider-Man 2, put his skills to the test.

Fallon kicked things off with a rendition of Iggy Azalea's "Fancy." While the audience loved his humorous interpretation of the hip-hop track, the actress' cover of Blues Traveler's "Hook" was the real showstopper. "I can't even talk to you right now," Fallon, 39, told Stone, 25, after she finished her set. "I forgot all about that song. So good! I really gotta pick it up now. I've gotta up my game."

For his second and final song, Fallon chose Styx's 1983 hit "Mr. Roboto." It was no match for the movie star, however, as Stone flawlessly—and presciently—performed DJ Khaled's 2010 jam "All I Do Is Win."

Indeed she did.

Earlier in the show, Stone opened up about her internet activity. "Lately I'm checking out some young mom blogs. Here's how it happened…There are people blogging about pretty much everything, but there women in my age range that are mothers. I can't even get my life together enough to put furniture in an apartment. I just Pinterest everything," the famous redhead said. "Pinterest is basically like a mood board online, and you can look on different sections and you can build your dream life, basically. You're like, 'Oh, these clothes! I would wear all these clothes if I could. This is what my house would look like.' They're just pictures that you would pin as if you were pinning them to a corkboard, but you're pinning them to an internet website...and your life is sad because it doesn't look like that."

"My Pinterest is secret because I would be humiliated if anyone would see how many inspirational quotes I have," she added, laughing. "I've got a lot of, like, 'Just pick yourself up by the bootstraps.'"

For more revelations—including which two reality shows Stone's watching—check out the videos now.

(E! and The Tonight Show are both part of the NBCUniversal family.)

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