Brood's outspoken statements in the press about sex and drug use brought him into the Dutch public arena even more than his music. He was romantically involved with the German singer Nina Hagen, with whom he appeared in the 1979 film Cha-Cha. He is reputed to be the subject of her song "Herrmann Hiess Er" (English title "Herrmann Was His Name") from the 1979 Unbehagen album, a song about a drug addict. Brood relished the media attention and became the most famous hard drug user in the Netherlands. "It is quite common for an artist to use drugs, but not for him to tell everybody. I admit that it scared me that my popularity could make people start using drugs," he once said in an interview.
In the summer of 1979, Brood tried to enter the American market, with support from Ariola's US division, which was attempting to expand into rock music. Following on the success of Shpritsz, the band was booked as a support act for The Kinks and The Cars, playing in auditoriums; "Herman Brood and His Wild Romance Tour Cha Cha '79" headlined in New York (Bottom Line) and Los Angeles (Roxy). A re-recorded version of "Saturday Night" peaked at number 35 in the Billboard Hot 100, but the big break Brood hoped for didn't happen. When he returned to the Netherlands in October 1979, his band had begun to fall apart, and soon his popularity went downhill. Go Nutz, the album Brood had recorded while in the States, and the movie Cha-Cha, which finally premiered in December 1979, were considered artistic failures, even though Go Nutz produced three charting singles in the Netherlands and the Cha Cha soundtrack attained platinum status. The 1980 album Wait a Minute... was a minor success, but the follow-up albums Modern Times Revive (1981) and Frisz & Sympatisz (1982) failed to make the Dutch album charts.