Jadine looked fantastic. She did say she has changed so much since doing The Apprentice and it showed in her face, she looked happier and more confident.

As for the others:

Tre must be in his early 30s
Kristine must be in her late 30s - too much sun and foundation makes her look about 42
Katie must be about 75 in horse years.

Apparently Tre is only 27 and Kristina is 37.

Agree with all the comments about Katie.
I'm 2 years older than her and she looks like she could be my aunt

I thought Jadine looked fantastic on you're fired, but she has an old face. She looks mid 30s to me, even when done up. I relaly liked her and how she softened in the course of filming. Her daughter is adorable too.