Justin Timberlake's not gonna let a frisky fan ruin the show!

The pop star performed in Philadelphia on Tuesday where a fan got a little too touchy feely while Timberlake was singing on stage.

Check out the video above to see what Justin does when a fan grabs his backside!

We gotta say the R&B crooner handled the situation like a champ -- he just casually swatted the concert goer's hand away and kept up his killer performance without missing a beat.

We're sure the former *NSYNC star is used to this kind of stuff on stage. How do you think JT handled the situation?

Tell toofab in the comment section below!

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