Billie Eilish has spoken.

The 24-year-old—who is a self-proclaimed Survivor fan—has played a big role in the show’s 50th season, serving as the namesake for the “Billie Eilish Boomerang Idol.” Now, she’s revealing how the cameo came to be.

“So basically like I wrote a letter to the contestants being like, ‘Here’s your secret idol,’” she told Amy Poehler on the May 5 episode of Good Hang, using air quotes. “‘If you use this idol, you can, you know.’”

Indeed, if contestants find the idol, they can use it for immunity during Tribal Council—except Billie’s comes with a twist. 

Players that find the idol, which comes with a letter from the “Bad Guy” singer explaining the rules, must give the talisman to someone on another tribe. If that person is voted out while still holding the idol, the immunity “boomerangs” back to the original player.

Naturally, since Survivor 50 is themed “In The Hands of the Fans,” famous enthusiasts of the show—including Billie, Jimmy “MrBeast” Donaldson, Jimmy Fallon, and Zac Brown—have helped introduce exciting twists throughout the season.