"I Don't Know Why" (sometimes listed as "Don't Know Why I Love You") is a song by American singer-songwriter Stevie Wonder, from the 1968 album For Once in My Life. It was released as a single on January 28, 1969, with "My Cherie Amour" on the B-side. A few months later, the single was re-issued with sides reversed because of the growing popularity of "My Cherie Amour", which became a Top Ten hit. Cash Box stated that "Wonder is softened just a trifle on this slower and more dramatically developing ballad."