Meghan Markle, who’s been helping wildfire victims in Southern California, teamed up with Billie Eilish to make a fan’s dream come true. And it was Adam Levine to came in with the assist.

Among the artists taking the stage was Billie Eilish (along with Finneas), for a rendition of “Wildflower.” Eilish was a leading nominee at this year’s show, with five nods. She only walked ...