The original artwork I messed with is by Jacopo Amigoni, "Ritratto di Farinelli."
Discarded ideas to include prompted to me by my surroundings suggested ...
- bunny slippers - as they obviously match the colour of the breeches
- the child offering chocolate instead of a flower
- The Muse or Art or Music having a tattoo or hairs on her legs ...
But nonono, now it stays that way

Full resolution:
http://www.philippejarousskyfans.com/stuff/pj%20farinelli%20final.png