A nursery rhyme titled “Lavender’s Blue” that dates back to the 17th century uses “dilly dilly” as part ... which was included in the 1949 film “So Dear to My Heart.” ...

So what does ... called So Dear To My Heart (with the strapline ‘A dilly dilly delight!’). More importantly, though, the song inspired the excellent 1985 power ballad Lavender by Marillion.