Born Anastasia Karanikolaou and known online as Stassiebaby, she has gained immense followings on Instagram, Vine, and Twitter. She is perhaps best known as a best friend of Kendall and Kylie Jenner. She has more than 3.5 million followers on Instagram.
She became friends with the Jenners around the age of 11.
Austin Mahone sang to her onstage during one of his performances.