2. Justin Bieber
Justin's manager, Scooter Braun, is also Tori's! Justin's always looking for new talent on YouTube (his latest artist is Madison Beer!) and although he didn't "discover" Tori, he did contribute to her success by tweeting a link to one of her videos to his millions of followers. He called her the "real deal" and he wasn't lying! He also mentioned that he was a fan of the amazing riffs Tori performed in her cover of Justin Timberlake's "Suit & Tie."