This is definitely one of those "pics or it didn't happen" moments.

Music manager Scooter Braun tied the knot with cancer activist Yael Cohen in Canada July 6, and the star-studded wedding included performances by Justin Bieber, Carly Rae Jepsen and Ed Sheeran. But the most entertaining moment of the night wasn't on the schedule. Here's an Instagram video uploaded by Bieber of Tom Hanks dressed as a Rabbi, singing "This Is How We Do It:"

Now don't say Justin Bieber's never done anything for you.