Hot off last month's Billie Eilish-dominated Grammys, the 18-year-old is back for another shot at awards show glory. On Tuesday (February 18), Eilish made her BRIT Awards debut, walking the red carpet in head-to-toe plaid before taking the stage for her live performance. Among the other red carpet highlights at London's O2 Arena: Harry Styles and Niall Horan got all suited up, Ellie Goulding dared to bare, and Lizzo was a real-life Hershey bar.