Phrase devil with the blue dress on?
The phrase is from a song with the same name. Devil with the Blue Dress On was a hit song for Mitch Ryder and The Detroit Wheels when they released a cover version of it in 1966. The song was written Shorty Long and William Stevenson and originally released by Long in 1964.
The pronouns that will replace the noun phrase 'the young girl' are she as a subject and her as an object in a sentence. Examples: The young girl wore a blue dress. (subject of the sentence) She wore a blue dress. (subject of the sentence) I saw the young girl in the blue dress. (direct object of the verb 'saw') I saw her in the blue dress. (direct object of the verb 'saw')
There does not seem to be any significance to the phrase, apart from the alliteration. In the USA during the 19th century the phrase was known as 'going to hell in a handcart'. In addition, there is a church in Gloucestershire showing a woman being pushed into hell, in a wheelbarrow, by a blue devil