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Justin Bieber joined The Late Late Show host James Corden for a drive around Los Angeles, singing his greatest hits and discussing his now-notorious penis picture. Corden was as impressed with the picture as Bieber's own dad was, but despite the grand display, Bieber insisted that there was shrinkage à la George Costanza. The new best buddies bonded so much that they even pulled over to giver Corden the Bieber makeover, complete with a long hoodie and a snakeskin snowboard.

Watch Corden and Biebs dodge paparazzi, sing Alanis and Kanye, and talk tattoos:

Sources: The Late Late Show with James Corden