Limited translucent red colored vinyl LP pressing. This deluxe package includes an OBI strip, gatefold album jacket with one pocket, printed inner sleeve, and original record labels. Cornerstone is the ninth studio album by the rock band Styx, released in 1979. Styx's third straight triple platinum selling album is best known for including the group's only #1 Billboard Hot 100 Single, the power ballad "Babe". The album also includes the folk rock song "Boat on the River".