HAIR is the four letter solution to the crossword for the term 'American Tribal Love Rock Musical'. HAIR is a rock musical written by James Rado and Gerome Ragni, which debuted on Broadway in 1968. It tells the story of a group of hippies living in New York City during the Vietnam War era, and their struggle to balance their lives with their ideals. The musical was revolutionary for its time, as it featured a racially diverse cast and tackled controversial topics such as racism, drug use, and the Vietnam War. The musical's most famous song, 'Aquarius/Let the Sunshine In', became an anthem of the counterculture movement.