Billie Eilish goes undercover and surprises fans while backstage on Ellen!
While we could pick out Billie Eilish from a crowd because of her trademark style and hair color just making her look "normal" was all it took to trick her fans backstage on Ellen.
As they talked about how much they love Billie she just sat on the floor pretending to be an employees shy kid. Then when they ask what would you say to Billie if she were here right now, they figure out she's sitting right there and freak out!