Chicago XI, the band's ninth studio album, marked a shift towards a more pop-influenced sound, featuring hit singles like "Baby, What a Big Surprise."
- The album was produced by James William Guercio.
- It reached number 6 on the Billboard 200 chart.
- This was the last album to feature original guitarist Terry Kath.
Chicago is a rock band formed in Chicago, Illinois, in 1967. They are known for their blend of rock, jazz, and pop music. Chicago XI was released in 1977, during a period when the band was experimenting with its sound and incorporating more pop-oriented elements.
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