And McPartland joins in for a duet in "Softly As in a Morning Sunrise, " originally composed as a tango by Sigmund Romberg and OscarHammerstein for the 1928 operetta The New Moon.
Loos ("Gentlemen Prefer Blondes") wrote "Happy Birthday" as a starring vehicle for her friend, Helen Hayes, and Richard Rodgers and OscarHammerstein produced it on Broadway in 1946, where it ran for nearly a year and a half.