On November 1, 2018, Smash Mouth released the single "Unity". It features hip-hop artists Kool Keith and Darryl McDaniels of Run-DMC. They then toured Australia in the same year during November to sell out crowds around the country, which consisted of a mix of theater, festival and pub shows. During the Arlie Beach Festival of Music in Queensland, Steve Harwell became ill and had to leave the stage. However, Nicky Bomba, Frankie J Holden, Wilbur Wilde from Melbourne Ska Orchestra and the remainder of Smash Mouth continued the set without him. Harwell recovered the next day and the Australian tour continued without any further incidents.