5 O'clock is a Bulgarian hip-hop group formed in 2000. The group consists of five members: Ivo Dimchev (Ivo), Dimitar Dimitrov (Dim4ou), Georgi Ivanov (Gogo), Nikolay Nikolov (Niko), and Stefan Ivanov (Stefo). 5 O'clock is known for their unique blend of hip-hop, pop, and traditional Bulgarian music. They have released several albums and singles, and have toured extensively throughout Bulgaria and Europe.