"I Don't Know Why" (sometimes listed as "I Don't Know Why I Love You") is a 1968 song by American singer-songwriter Stevie Wonder, from the album For Once in My Life (1968). It also serves as the B-side for the 1969 hit "My Cherie Amour". It peaked at No. 39 on the US Billboard Hot 100. The song was recorded when Wonder was 18 years old, and became a moderate hit single, together with "You Met Your Match", another song from the album.