Hit 105 (call sign: 4BBB) is a commercial FM radio station broadcasting on 105.3 MHz in Brisbane, Australia. It is part of Southern Cross Austereo's Today's Hit Network. Hit 105's primary audience is 10 to 24 age group. The station was previously branded as B-105 FM following its conversion from AM to FM. This lasted until a co-branding as "Hit 105.3 B 105", then as "Hit B 105" and finally dropped the "B" reference to its present brand identity "hit 105". The B had referred to Brisbane.