Justin Bieber has been winning us over with a slew of endearing appearances lately, and his latest viral video with Jimmy Fallon is a nice addition to the list. The singer, who has been promoting his new album, Purpose, non-stop all week, joins the Tonight Show host for a hilarious clip featuring their elaborate secret handshake — one that includes fake punches, finger snaps, and even a "butt tap." Watch the funny video above now, then see Justin's latest carpool karaoke segment with James Corden.
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