Chicago is an American rock band formed in Chicago, Illinois, in 1967. The group began calling themselves the Chicago Transit Authority in 1968, then shortened the name in 1969. Self-described as a “rock and roll band with horns”, Chicago’s songs often combine elements of classical music, jazz, R&B, and pop music.
To date, Chicago has sold over 40 million units in the U.S., with 23 gold, 18 platinum, and eight multi-platinum albums. They have had five consecutive number-one albums on the Billboard 200[13] and 20 top-ten singles on the Billboard Hot 100. The group has received ten Grammy Award nominations, winning one for the song, “If You Leave Me Now”.