Omar Rudberg rose to prominence as a member of the Swedish boy band The Fooo (later known as The Fooo Conspiracy and finally FO&O). The group was formed in 2013 and gained early fame by opening for Justin Bieber at the Ericsson Globe in Stockholm. 

• Formation (2013): The band originally consisted of Omar Rudberg, Felix Sandman, Oscar Enestad, and Oscar "OG" Molander.