Olgica "Olja" Karleuša (Serbian: Оља Карлеуша) (born October 15, 1980 in Belgrade) is a contemporary Serbian pop-folk singer. She is not related to Jelena Karleuša as is often assumed.

She participated in the Serbian VIP big brother final 2007.

In January 2009, she gave birth to a baby boy.

Discography
No Žene lavice (2003)
No Ljubavna terapija (2005)
No Brushalter (2007)
No Zicer (2010)