The House Bunny
(2008)

After finally being offered a centerfold in Playboy and invited back to live at the mansion, Shelley (Anna Faris) decides to go back to Zeta House sorority.  She appeals to the school to keep their charter and after her speech, 23 girls announce their intention to pledge Zeta.  The Zeta sorority stays on campus, Shelley stays on as their house mother and reintroduces herself to handsome Oliver (Colin Hanks).

Thanks John!