Why Is Tom Hanks Singing ‘This is How We Do It’ Dressed Like a Rabbi?

Image by Getty Images
Presented for your humble viewing: A video of Tom Hanks, dressed as a rabbi, singing “This Is How We Do It,” courtesy of Justin Bieber.
Caption: “Haha Tom Hanks singing “This Is How we do it” dressed like a Rabbi lol #thatdancetho”
SO MANY questions:
Why is Tom Hanks dressed like a rabbi?
Why is Tom Hanks hanging out with Justin Bieber?
Why are they singing the Montell Jordan classic at what looks to be some kind of wedding or bar mitzvah?
Nevertheless, the video is delightful, as is anything Tom Hanks. Enjoy!
[h/t Buzzfeed]
Update:
According to Vanity Fair, the video was taken at Scooter Braun’s wedding reception, which took place over the July 4 weekend. (Braun is Bieber’s manager.)