Just watching this wonderful segment again

1. Who are Stevie Wonders backing singers? - Nico Z credits the musicians from Wonderlove who appear onstage but not the (three?) female singers Stevie dances with

2. Where was the clip recorded? I had always assumed Philadelphia but do I see Stevie getting a cream pie ? If so that puts it @ MSG, according to Greenfields book

I know someone out in iorr.org-land will know...