Chicago is an American rock band formed in Chicago in 1967. The group began calling themselves the Chicago Transit Authority in 1968, then shortened the name to its current one in 1969. Wikipedia
Earth, Wind & Fire is an American band whose music spans the genres of jazz, R&B, soul, funk, disco, pop, Latin, and Afro-pop. They are among the best-selling bands of all time, with sales of over 90 million records worldwide. Wikipedia