Complex sentence: His first public performance was at the Bum Fest in 2008 with song "Čija si", which won him first place.Second performance was at Suncane skale with song "Boje Ljubavi", which won him 6th place.
Split into simpler sentences: His first public performance was at the Bum Fest in 2008 with song "Čija si". He won first place.Second performance was at Suncane skale with song "Boje Ljubavi", and Čičić won 6th place.