Have you seen this video? (Psst..647 million views and counting!)
Billie Eilish is a 17-year-old singer - who was also recently named Billboard's Woman of the Year.
The 'Bad Guy' hitmaker (above video) has enjoyed a successful year and has seen her bag her first ever Grammy nominations as well as performing at an awards show for the first time when she took to the stage at the American Music Awards (AMAs) on Sunday. She picked up awards for New Artist of the Year and Favourite Alternative Rock Artist at the AMAs
Here's a little bit more of Billie Eilish from Ellen DeGeneres' interview..