Sia Kate Isobelle Furler is an Australian singer and songwriter. Born and raised in Adelaide, she started her career as a singer in the acid jazz band Crisp in the mid-1990s. When Crisp disbanded in 1997, she released her debut studio album, OnlySee, in Australia. Sia moved to London and provided vocals for the British duo Zero 7. She released her second studio album, Healing Is Difficult, in 2001 and her third, Colour the Small One, in 2004.

Madison Nicole Ziegler is an American actress and dancer. She appeared in Lifetime's reality show Dance Moms, from 2011 until 2016, and starred in a series of music videos by Sia, beginning with "Chandelier" and "Elastic Heart", which have in total attracted more than 6 billion views on YouTube. Ziegler has appeared in films, television shows, concerts, advertisements and on magazine covers.