Songs in this list are covers recorded by Billie Eilish that have not been officially released commercially that exist as either a studio recording or live performance.
- "Bad"
- "Call Me Back"
- "Can't Help Falling In Love"
- "Dancing On My Own"
- "Eres Tú"
- "Hotline Bling"
- "Jealous"
- "Secret"
- "The End of the World"
- "The Hill"
- "Thinkin' Bout You"