If I had to guess a cast (not pick a cast) of we'll say 16 All Stars. I'm also going to exclude people who I don't think would come back. And I only included people that played once.
Eric (BB8)
Memphis (BB10)
Keesha (BB10)
Hayden (BB12)
Kalia (BB13)
Ian (BB14)
Danielle (BB14)
McCrae (BB15)
Amanda (BB15)
Derrick (BB16)
Cody (BB16)
Donny (BB16)
Vanessa (BB17)
Paul (BB18)
Victor (BB18)
Natalie (BB18)