It was do or die for Toto on the group's fourth album, and they rose to the challenge. Largely dispensing with the anonymous studio rock that had characterized their first three releases, the band worked harder on its melodies, made sure its simple lyrics treated romantic subjects, augmented Bobby Kimball's vocals by having other group members sing, brought in ringers like Timothy B. Schmit, and slowed down the tempo to what came to be known as "power ballad" pace. Most of all, they wrote some hit songs: "Rosanna," the old story of a lovelorn lyric matched to a bouncy beat, was the gold, Top Ten comeback single accompanying the album release; "Make Believe" made the Top 30; and then, surprisingly, "Africa" hit number one ten months after the album's release.