Hey when I looked up the movie spectacular on Wikipedia I found this:
Tammi (Victoria Justice), Royce's new girlfriend that is a snobby, selfish girl. It is hinted she was a member of "Spectacular!" because of the number of times Courtney calls her a backstabber and that the letter I in her name stand for the "ice in her veins".
I'm not sure if this is correct information but I know some people on Wikipedia could be wrong.