"Won't Sleep" is a song by Australian singer Tones and I.

It was released on 14 May 2021 through Bad Batch Records, distributed by Sony Music in Australia and New Zealand and globally by Elektra Records as the second single from her debut studio album, Welcome to the Madhouse.

[2] The music premiered on 14 May 2021, and was co-directed by Tones, Nick Kozakis and Liam Kelly, It shows two kids stumbling into a haunted house filled with monsters, with the singer as their leader.

[3] Laura English from Music Feeds said "It's a brooding pop release full of really fun, textured percussion [and] the production on this one is absolutely ace.

"[1] Sose Fuamoli from Triple J said the track "has a delightfully creepy electro vibe [and] is all about getting up to no good; mischief in the best way.