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    19 Super-Famous Celebs Who Were Literally Discovered On YouTube As Children

    Turns out Ari didn't get signed because of Victorious!

    1. Ariana Grande

    2. Shawn Mendes

    3. Dua Lipa

    4. Bo Burnam

    5. Tori Kelly

    6. Allesia Cara

    7. Darren Criss

    8. Dylan O'Brien

    9. Justin Bieber

    10. Kate Upton

    11. Christina Grimmie

    12. Lilly Singh

    13. Soulja Boy

    14. Chloe and Halle Bailey

    15. Megan Thee Stallion

    16. 5 Seconds of Summer

    17. Charlie Puth

    18. Ed Sheeran

    19. And finally, Austin Mahone