Tracklist
| A | Baby, What A Big Surprise | 3:04 |
| B | If You Leave Me Now | 3:53 |
Companies, etc.
- Mastered At – The Mastering Lab
Credits
- Arranged By [Orchestra] – Dominic Frontiere (tracks: A), James William Guercio (tracks: A), Jimmie Haskell (tracks: B), Peter Cetera (tracks: A)
- Engineer – Wayne Tarnowski (tracks: B)
- Producer – James William Guercio
- Written-By – Peter Cetera
Barcode and Other Identifiers
- Matrix / Runout (Etching side A): P ZSS 163432-1G TML-M
- Matrix / Runout (Etching side B): P ZSS 161363 1K TML-M
Other versions
| Category | Artist | Title (Format) | Label | Category | Country | Year |
|---|---|---|---|---|---|---|
| 13-33351 | Chicago | Baby, What A Big Surprise / If You Leave Me Now (7", Single, RE) | Columbia | 13-33351 | US | 1977 |
Tracklist Hide Credits
| A | Baby, What A Big SurpriseWritten-By – P. Cetera* |
3:04 |
| B | Takin' It On UptownWritten-By – F. Kagan*, T. Kath* |
4:45 |
Companies, etc.
- Licensed To – CBS Records
- Published By – Island Music Ltd.
- Phonographic Copyright (p) – CBS Inc.
Credits
- Producer – James William Guercio
Other versions
| Category | Artist | Title (Format) | Label | Category | Country | Year |
|---|---|---|---|---|---|---|
| 3-10620 | Chicago | Baby, What A Big Surprise / Takin' It On Uptown (7", Single) | Columbia | 3-10620 | US | 1977 |
| 06SP 190 | Chicago | Baby, What A Big Surprise (7", Single) | CBS/Sony | 06SP 190 | Japan | 1977 |
| 3-10620 | Chicago | Baby, What A Big Surprise / Takin' It On Uptown (7") | Columbia | 3-10620 | Canada | 1977 |
| CBS 5672 | Chicago | Baby, What A Big Surprise (7", Single, Promo) | CBS | CBS 5672 | UK | 1977 |
| 3-10620 | Chicago | Baby, What A Big Surprise (7", Single) | Columbia | 3-10620 | US | 1977 |
