Celebrity It's Kendall Jenner's 20th Birthday! See 11 Photos That Prove Why She's Instagram Mega-Star By Josephine Cusumano Josephine Cusumano Josephine Cusumano is a writer, editor, and content specialist. She covers all things fashion, celebrities, and lifestyle. InStyle's editorial guidelines Updated on November 3, 2015 @ 07:00AM Pin Share Tweet Email Photo: Dominique Charriau Model about town Kendall Jenner is officially entering her 20s! The Keeping Up with the Kardashians star has a milestone birthday today, and we're honoring the young adult with a look at how she's proven herself as a social media queen—much like her older sister, Kim Kardashian. For starters, she recently earned the most liked Instagram post, thanks to her now famous hair heart pic—which garnered over 3 million likes and counting—and since, her fan base has grown to over 39 million followers. Plus, Jenner is among the top models who has given followers a behind-the-scenes look at Fashion Month. PHOTOS: See All of Kendall Jenner's Looks from Fashion Month Aside from her rapid rise to social fame, the elder Jenner sister has strutted her way to the top of the modeling world, and her recent inclusion on the Forbes Highest-Paid Model list for 2015 speaks for itself (she's at the No. 16 spot with a $4 million income). Jenner made her runway debut just a few years ago, and today, she's the face of beauty and fashion brands like Estée Lauder and Calvin Klein. What's more, she's appeared in some of Fashion Week's biggest shows—from Balmain (she walked twice in one show!), Michael Kors, DVF, to Marc Jacobs—and currently fronts the Balmain x H&M campaign alongside friend and fellow model, Gigi Hadid. Check Out Kendall Jenner's New Estée Lauder Campaign In honor of her 20th birthday, celebrate with 9 of Jenner's Instagram posts that prove why she's a social media maven: When She Showed How to Have Fun with a Best Friend When She Took Fans Behind-the-Scenes at Fashion Week When She Proved Kanye West and Kris Jenner Know How to Party When She Gave Us Blonde-Envy When She Modeled the Perfect Swimsuit Shot When She Said "Yes" to Karl Lagerfeld When She Debuted Her Exclusive Estée Lauder Lipstick Shade When She Beat Kim Kardashian with the Most-Liked Instagram When She Shared the Best Model Selfie to Date When She Reminded Everyone She's Young at Heart When She Defined #SisterGoals