1955 three versions for the soundtrack of Serenade, the best of which (by far) is sung softly in one of the "Mexican" scenes in the film and has not been released commercially.
Serenade
(Brodszky-Cahn) – different song
1955 two versions recorded for the film of the same name, but never used. One of these was released on the 2004 BMG UK CD Serenade/A Cavalcade of Show Tunes. The unreleased take is better in some respects (though the ending is superior on the released version).
Serenade
(from The Student Prince) (Romberg-Donnelly) (partially updated lyrics by P.F. Webster on 1952 MGM Version)
1946 live radio broadcast on Great Moments in Music
1954 Shower of Stars (CBS TV special): two renditions: an afternoon rehearsal (available on the 2021 Sepia Records CD The Immortal Voice of Mario Lanza: A Centennial Celebration) and a live performance in the evening (see our Multimedia section to watch the latter)
1959 RCA: The Vagabond King (with soprano Judith Raskin)
Someday I’ll Find You
(from Private Lives) (Coward)
1952 two (released) versions for Coca-Cola Radio Show; the rendition first released on the 1993 CD Don't Forget Me is marginally superior