S1, E15: After law firm big wig Porter Warner (guest star BOB SAGET) advises Kimmie to act more professional, she starts calling herself "Kimberly" and looks to Kendall for advice. But friends Helen-Alice and Marika fear that the new and improved Kimmie may be too cool for their 10th annual Cookie Prom, a celebration of their disastrous high school prom.