I'm Leaving It (All) Up To You is a classic ballad, but its major success came through cover versions. The most prominent 1970s version is the romantic Pop/Bubblegum Pop rendition by the famous American brother-and-sister duo, Donny and Marie Osmond. The song was originally written and recorded by Don and Dewey in 1957 and later became a US #1 hit in 1963 by Dale & Grace. Donny and Marie revitalized the tune in 1974, turning it into a major crossover hit and cementing their status as a leading P