Marta Katarzyna Wiktoria Wiśniewska (aka Mandaryna, born 12 March 1978 in Łódź as Marta Mandrykiewicz) is a Polish dance singer and actress. In 2009 she changed her record company & with a new producer her style to produce AOK. Previously, in 2003 she played the role of Katarzyna Sarnecka in the TV-series Na Wspólnej. In 2004 she had a hit with the song "Here I Go Again", a cover version of a Whitesnake song, this time produced by Groove Coverage.