Pretty good performance, though a few things Meatloaf and Cher performed Dead Ringer for Love (which I'm sure you're aware of), but Fire Inc are the ones who performed Tonight is What It's Like to Be Young, it was one of two songs performed for the film "Streets of Fire" and was a band created by Jim Steinman (who wrote both songs and Dead Ringer). The other song was Nowhere Fast which was covered by Meatloaf with alternate lyrics. I was surprised the guy was still say "Boy" instead of "Girl" for the first part. The song isn't a duet but by making it one you could've played into that change. Aside from that small criticism you guys did great. I have heard of performances like this where a short version of one song going into another is a thing.
"The chick" is Karine Hannah whom Jim Steinman considered to be one of the best singers he'd ever worked with - and he certainly had a knack for scouting talent so maybe use her name next time huh?