"Firestone" is a song by Norwegian DJ and record producer Kygo, featuring vocals from Australian singer Conrad Sewell. It was released on 1 December 2014 and reached number one on the Norwegian Singles Chart and became a big international hit for Kygo on many other charts. Birdy performed a cover of the song on BBC Radio 1's Live Lounge.
In 2020, Dutch TV host and music producer Arjen Lubach claimed in his autobiography Stoorzender to be the co-creator of an early demo of the song. According to his account, his friend and fellow musician Martijn Konijnenburg sold the song without giving credits or royalties. Konijnenburg has denied the allegations.