It sounds like you're looking for a specific blog post that might offer downloads or links to the soundtrack via Google.
However, I should let you know that most blog posts offering direct downloads for commercial soundtracks (MP3 files, ZIPs, or ripped audio) are likely unauthorized and may contain malware, broken links, or copyright-infringing material. The Chicago soundtrack is still under copyright protection. Chicago 2002 Film Soundtrack Download - Google
