Slza, a Czech pop duo consisting of singer Petr Lexa and guitarist Lukáš Bundil, formed in 2014. Their breakthrough came with the release of their debut single "Lhůta záruční", which featured lyrics by Ondřej Ládek, also known as Xindl X. The following year, they released their first album Katarze, which included hits such as "Celibát" and "Fáze pád". The title track from Katarze was used as the theme song for the television series Přístav, in which Lexa also acted. In 2017, Slza released their second album Holomráz, followed by 3 in 2020 and Monodrama in 2023. The group received three nominations at the Anděl Awards in 2015 and was named Discovery of the Year and Internet Star at the Český slavík awards.