Billie Eilish's 21st birthday

Billie Eilish, who turns 21 on Sunday (Dec. 18), achieved more before reaching legal age than, well, just about anybody. She set records at awards shows and on the Billboard charts that are likely to stand for many years. Eilish was just 15 in November 2017 when she entered the Billboard 200 for the first time with Dont Smile at Me. The EP debuted at an unimpressive No. 185, but it ultimately cracked the top 15. It has logged 246 weeks on the chart, longer than any other Eilish title. Eilish was 16 in June 2018 when she hit the Billboard Hot 100 for the first time with “Lovely,” a collab with another talented young artist, Khalid (then 20). Eilish’s success has truly been global. Both of her first two albums reached No. 1 in Australia, Austria, Belgium, Canada, Denmark, Holland, Finland, G...