Who sings the song . I must be (Crazy) for loving you . male vocalists in the 1960's?

The song "I Must Be Crazy (For Loving You)" is performed by several artists, but one notable male vocalist from the 1960s is Bobby Vinton. His style and romantic ballads were popular during that era, and this song fits within his repertoire. Other male singers of the time may have covered similar themes, but Vinton's rendition stands out.