Marija started her professional career in 2005, when she participated in the Serbian National Final for Junior Eurovision Song Contest 2005 with the song "Geografija". That was the first Serbian National Final for Junior Eurovision, and it was organised by Decji Kulturni Centar Beograd, like FeDemus is now, so Marija was given the song to sing it at competition. She didn't win, but the public remembered her voice and appearance. After that, she started to participate in many other festivals and competitions. Marija became a member of the RTS children choir.