La Sombra de Chicago or La Sombra de Tony Guerrero is a Tejano band originally from Chicago, IL. The group was widely popular during the late 1980s and most of the 1990s, often described as "the number one show band in the U.S.A." and "the world." La Sombra is credited with over 20 major studio releases from 1984 to 1996. Although the band originated from suburban Aurora, Illinois, they gained national acclaim when they moved their base from the Chicago area to Corpus Christi, Texas. Numerous appearances on the nationally syndicated "The Johnny Canales Show" garnered them a tremendous following that enabled them to be dubbed "The Number One showband" of their time.
"La Sombra" was fronted by founder Tony Guerrero, who along with younger brother Gavino, gave the group its distinctive break-through sound. Albert "Tiger" Diaz, who later went on to success as a solo artist, was a founding member of the group from 1984-1989.
The group's high-energy sound and stage presentation garnered them national prestige through the late 1980s and early 90's. After a variety of line-up changes, "La Sombra" released their last original recording in 1995(Numerous greatest hits compilations have followed).