Martina Marjerle, known professionally as Martina, is a Croatian singer of mixed Croatian and Slovenian descent.
As a backing vocalist, she has performed at the Contest six times: in 2003 with the Croatian representative, Claudia Beni, in 2007 with the Slovene representative, Alenka Gotar, in 2008 with the Montenegrin representative, Stefan Filipović, in 2011 with the Slovene representative, Maja Keuc, in 2012 with the Slovene representative, Eva Boto, and in 2014 with the Montenegrin representative, Sergej Ćetković.
Together with the string quartet Quartissimo, she represented Slovenia at the Eurovision Song Contest 2009 in Moscow but failed to qualify for the final.