Who you cannot be

[Britney]

Here's the list of people you cannot sign up as due to the fact that they were in season one:

Marcus
Jerri
Tyson
Aras
Kelly B
John Carroll
John Fincher
Grant
Keith (South Pacific)
Sonja
Ami
Whitney
Dave
Leslie
Ibrehem
Parvati
Brendan
Semhar
Natalie Tenerelli
Mikayla