Ms Diaz may be very well versed in pop culture environmentalism, but there's a difference between that and being qualified to lead a lecture at a major university.
It says in the link it is for a MTV program, if her lecturing is increasing awareness for environment causes, where is the problem?

Finn's mom is correct, Cameron Diaz does quite a bit for conservation. Just because she is young actress who is only a "High school grad" (gasp, oh no) doesn't mean she has nothing to bring to the table.

The wise are not necessarily well educated and the well educated are not necessarily wise.