Pat Friday

This article is for singer Pat Friday, for the Kansas City Athletics general manager see Pat Friday (Baseball executive)

Helen Patricia Freiday (born 1921) was an Idaho-born singer best remembered for her work with Glenn Miller. She also worked with Roy Rogers, although she did not care for that style of music. She was a "ghost singer" for Lynn Bari, but was never credited. She sang "I Know Why (And So Do You)", the original vocal version of "At Last", and "Serenade in Blue" in the movies Sun Valley Serenade and Orchestra Wives.

While a student at the University of California, Los Angeles, Friday was a singer on The Old Gold Don Ameche Show on the NBC Red radio network. A contemporary magazine article noted, "In order to attend rehearsals she has to cut Friday afternoon classes ... but she makes up by spending all the time she can in a corner of the studio, carefully doing her homework."