BILLIE EILISH revealed that she battled COVID back in August, and it was pretty serious. She said, quote, "It was bad.  I mean, I didn't die, and I wasn't gonna die, but that does not take away from how miserable it was. I mean, it was terrible.

"I still have side effects.  I was sick for, like, two months almost.  This was in August, a couple months ago."  She added, quote, "I think if I weren't vaccinated, I would have died, because it was bad." Billie does have a cough right now, but it's not COVID.  She thinks she got it from Lorne Michaels when she did "Saturday Night Live" this past weekend, because he was sick. She also talked about how nervous she was about doing the show.  Quote, "I cried every single day of the week, no joke at all."

She also threw up on the plane on the way to New York, and ended up with some . . . let's just say DIGESTIVE STRESS . . . that was so bad she had to get, quote, "fully naked" on the toilet.  Whatttttt???