"That's All," Bobby Darin's second LP, is his most important record. Darin's reputation as a teen idol was established in 1958 and 1959 with the Top Ten hits "Splish Splash," "Dream Lover," and "Queen of the Hop." Later in 1959, That's All broadened his appeal and secured his immortality. The LP begins with Darin's trademark song, Three Penny Opera's "Mack the Knife" which was number one for an impressive nine weeks. "That's All" won Grammy awards for Record of the Year and Best New Singer. In his first attempt to select more mature material, Darin chose songs like Ira and George Gershwin's "It Ain't Necessarily So" from Porgy and Bess and the Hammerstein song "Softly, as in a Morning Sunrise." That's All is an album of pop standards but also includes the Top Ten hit "Beyond the Sea." Much is made of Frank Sinatra's band leader Billy May, but Richard Wess shines on Darin's early LPs. His orchestration in "I'll Remember April" is a brassy and swinging success. That's All might not be a new fan's first Darin purchase. However, it is an important release in the Rock and Roll Hall of Famer's career. This LP proves that not every rocker suffers the "sophomore slump." That's All was on the Billboard charts for 52 weeks and peaked at #7.