Josie,
what a great idea for a song, and you're the perfect person to pull it off!
Though you refer to it as "sixties girl groups", it's also a good match for what's referred to around here as "beach music". So, in case you have a strong desire to spend your retirement years playing music in Myrtle Beach SC, write more of this genre, and you'll be good to go!
I thought the horns fit perfectly with the mood of the song
I especially liked the "responses" (the little one word comments thrown in by the background singers)
Gladys Knight has her Pips... you should think up a name for your BG singers
Josie Beck and the __________ <--fill in the blank