Chicago's unmistakable sound has made them one of the best-selling music groups of all time, with over 100 million records sold worldwide. Chicago's massive popularity extends to Christmas music. The group have released two RIAA Gold-Certified Christmas albums - 'Chicago 25' and 'What's It Gonna Be, Santa?' Both albums were celebrated with a Gold Record presentation to the band at the Greek Theatre in Los Angeles on August 19th. Rhino/Warner Music release a new collection titled 'Greatest Christmas Hits', featuring their most popular Christmas songs.