Vogue on Instagram: "Happy birthday, @billieeilish! Over the last several years, as she’s grown from sweet teen to self-assured adult, the singer has undergone both a beauty and style evolution. Revisit Eilish’s best looks and her installment of Vogue’s #BeautySecrets at the link in our bio."

Explaining on Instagram: "Billie Eilish has been open about living with Tourette’s syndrome, a neurological condition she was diagnosed with at just 11 years old. Her tics are mostly subtle, such as raising an eyebrow, clicking her jaw, or flexing certain muscles, but they are a constant part of her daily life. As she has explained herself, she “never doesn’t tic at all,” even if most people don’t notice right away. While the condition can be physically and mentally exhausting, Billie has notice