There were 5 things from the 'Joy' TED talk
- round shapes
- pops of bright colour
- symmetrical shapes
- a sense of abundance/multiplicity
- a feeling of lightness/elevation
So if you purchased an all over (abundance) feather print (lightness) on a fairly brightly coloured background (colour) and made a loose tee out of it you could get 3/5 and it might help the mood.
I think I'd rather have my circles on things than the whole garment be circular, but mayeb this drives the boule coat.