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(Yahoo!) - In his first hosting gig on Saturday Night Live, Justin Bieber didn't address the Grammy snub that allowed him to be at New York's Rockefeller Center instead of L.A.'s Staples Center this weekend.

But he was plenty willing to make light of two other controversies that have dogged him in the last couple of months: that, post-Selena, he's supposedly turned into a pothead and a womanizer. His attitude, if we can take the evening's comedy sketches as any indication? Guilty as charged on having been ganja-crazy as well as girl-crazy, and sorry about the former, if not the latter.

Watch Justin's sketches below:

JB was also the musical guest of the evening. Check him out:

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