He even had a sense of humor about the situation, giving the audience a hard time for, well, listening to Justin Bieber. 'Come on. If you're not feeling this right now, get the f- out of here," he teased. 'How many people thought that you would like Justin Bieber?"

Interestingly, that question has been on millions of American minds since the release of "What Do You Mean?" in August 2015. The singer's sturdiest album yet has sprung him from the teen-pop mold into legitimate mainstream stardom. Watch clips from the impromptu live set - here.

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