At the top of last night's Daily Show viewers were greeted by a surprise: Justin Bieber, who wasn't filling in for Jon Stewart, but who had according to the script switched bodies with the talk-show host, thanks to some magic skull action. Watch the clip—which, spoiler, involves what one might call a "hashtag tramp stamp"—below.

Intro - Justin Bieber and Jon Switch Bodies

Bieber came back (in pretaped form) for the show's closing Moment of Zen, and someone should really put that drumming bit on loop for all the complainy old people who went into "NO TEEN IDOLS" mode when confronted with the singer's adorable face:

Moment of Zen - Moment of Bieber