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    11 Side-By-Sides Of YouTube Singers That Will Make You Feel Very Old

    They grow up so fast!

    1. Sophia Grace Brownlee

    2. Rosie McLelland

    3. Greyson Chance

    4. Lennon Stella

    5. Maisy Stella

    6. MattyBRaps

    7. Rebecca Black

    8. Jenna Rose

    9. Austin Mahone

    10. Shawn Mendes

    11. Justin Bieber