Demi Lovato recently inked a multi-book deal that will include a memoir. While it might seem premature to pen an autobiography at age 21, she's not the only under-30 celeb to have done so.


Miley Cyrus, "Miles to Go" (2009)

Age when published: 16

miley


Farrah Abraham, "My Teenage Dream Ended" (2012)

Age when published: 21

farrah


Justin Bieber, "First Step 2 Forever: My Story" (2010)

Age when published: 16

bieber


Gabby Douglas, "Grace, Gold, and Glory My Leap of Faith" (2013)

Age when published: 17

gaby


Britney Spears, "Heart To Heart" (2000)

Age when published: 18

britney


Paris Hilton, "Confessions of an Heiress" (2004)

Age when published: 23

paris


Drew Barrymore, "Little Girl Lost" (1990)

Age when published: 15

drew


Jodie Sweetin, "unSweetined: A Memoir" (2019)

Age when published: 27

jodie


Kelly Osbourne, "Fierce" (2009)

Age when published: 24

kelly



Also on HuffPost:




Loading Slideshow...



  • Snooki, "A Shore Thing"


    (Getty)




  • Lauren Conrad, "L.A. Candy"


    (Getty)




  • Lauren Conrad, "Sweet Little Lies"


    (Getty)




  • Nicole Richie, "The Truth About Diamonds: A Novel"


    (Getty)




  • Khloe and Kourtney Kardashian, "Dollhouse"


    (Getty)




  • Ethan Hawke, "Ash Wednesday"


    (Getty)




  • Pamela Anderson, "Star: A Novel"


    (Getty)




  • Madonna, "The English Roses"


    (Getty)




  • Courtney Thorne-Smith, "Outside In"


    (Getty)




  • Julianne Moore, "Freckleface Strawberry"


    (Getty)




  • Sharon Osbourne, "Revenge"


    (Getty)




  • James Franco, "Palo Alto: Stories"


    (Getty)




  • Steve Martin, "An Object of Beauty"


    (Getty)




  • Hugh Laurie, "The Gun Seller"


    (Getty)




  • Tyra Banks, "Modelland"


    (Getty)