Emma Stone has been killing it during her publicity tour for "The Amazing Spider-Man 2," but last night, Spidey himself stole the show.

With no Emma around to adorably talk about the Spice Girls yet again, Andrew Garfield was on his own appearing on "The Tonight Show with Jimmy Fallon" -- and he nailed it.

VIDEO: Emma Stone Has EPIC Lip Sync Battle with Jimmy

The actor decided to have a viral moment of his own ... and, like his girlfriend, it included bursting into song.

What tune did he pick? The original "Spider-Man" theme song from the Saturday morning cartoon!

With an acoustic guitar in hand, Andy sang the entire tune while Jimmy provided backup vocals and played tambourine. It was a pretty amazing performance.

Check out the original opening below: 


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