Joanna Klepko (born 25 June 1983 in Warsaw), known by her stage name Cleo, is a Polish singer. She will represent Poland in the Eurovision Song Contest 2014 in Copenhagen, Denmark along with Donatan with the song "My Słowianie". 　　She is a graduate of the Warsaw University of Life Sciences. 　　She sang in gospel choir "Soul Connection". She is the winner in first season of contest "Studio Garaż" for the category Rhythm and blues. She has worked among others with Pezet, Onar, Pih, Ramona 23, WSRH, Wet Fingers and Endefis. 　　In 2011 she took part in first season of polish version talent show X Factor. Since 2013 she has worked with Donatan. 　　On 25 February 2014, it was announced by TVP in talk show Świat się kręci that Cleo with Donatan and their song "My Słowianie" will represent Poland in the Eurovision Song Contest 2014 in Copenhagen, Denmark.