Katarzyna "Kasia" Moś is a Polish singer and songwriter. She recorded her first demo in 2002 and four years later entered the 2006 Polish national final for Eurovision with the song "I Wanna Know", finishing in 10th place.
In 2011, she traveled to the United States where she did a year and a half as part of the Pussycat Dolls Burlesque Revue. She returned to Poland after completing her contract where she auditioned for the third season of the Polish version of Must Be the Music, finishing in third place. In 2015, she released her debut album.
She represented Poland at the Eurovision Song Contest 2017 in Kiev with the song Flashlight, finishing in 22nd place in the final.