Justin singing for fans outside the “Tonight Show with Jay Leno” studios

Justin performing “Boyfriend” on The Tonight Show With Jay Leno (LQ)

Justin surprise street performance for fans (HD)

Justin singing today

More photos from Justin performing on Jay Leno

Justin on Jay Leno

Justin Performing and meeting fans on Jay Leno

More of Justin performing outside Leno (HQ)

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Justin, Selena, Katy Perry, and her grandmother last night

More photos of Justin outside of Leno (HQ)

Justin performing outside of Leno (HQ)

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Justin backstage at Leno

Bieber fans (Justin on Leno)

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TONIGHT: Jaywalking, #Ted’s Mila Kunis, @JimNorton, and@justinbieber performs ‘Boyfriend.’