Aysel Mammadova (Azerbaijani: Aysel Məmmədova; born 3 July 1989), known professionally as Aisel, is an Azerbaijani singer. She represented Azerbaijan in the Eurovision Song Contest 2018 with the song "X My Heart". She has also performed the Azerbaijan national anthem at the opening of the Formula 1 Azerbaijan Grand Prix 2023. Mammadova attended the Special Secondary Musical School and the Azerbaijan State Conservatory. Mammadova participated in the Baku International Jazz Festival in 2005 and 2006, and the Montreux Jazz Festival in 2009. She is a member of the Baku Jazz Center. Mammadova was announced as the Azerbaijani artist for the Eurovision Song Contest 2018 on 8 November 2017.