During World War II, Bob Crosby spent 18 months in the Marines touring with bands in the Pacific. His radio variety series, "The Bob Crosby Show", aired on NBC and CBS in different runs from July 18, 1943, to July 16, 1950. This was followed by "Club Fifteen" on CBS from 1947 through 1953 minus a brief interlude when he was replaced as host by singer Dick Haymes during parts of 1949 and 1950. During his stint on "Club Fifteen", he was teamed with the ever-popular Andrews Sisters three nights per week, singing with them and engaging in comedy skits. He first met the trio in 1938 when his orchestra backed their Decca recording of "Begin the Beguine", their popular vocalization of Artie Shaw's big band hit. One can't help when hearing these old "Club Fifteen" broadcasts how eerily similar Bob and the Andrews Sisters sound to the trio's very frequent and hugely successful pairings with brother Bing Crosby on the Decca label. Bob and Patty even scored a hit duet on Decca Records with their duet recording of the novelty "The Pussy Cat Song (Nyow! Nyot Nyow!)", which peaked at No. 12 on Billboard. A half-hour CBS daytime series, "The Bob Crosby Show", followed from 1953 to 1957. Bob introduced the Canadian singer Gisele MacKenzie to American audiences and subsequently guest-starred in 1957 on her NBC television series, "The Gisele MacKenzie Show".