Idgi, the purpose and meaning of pretty girls is pretty girls. Britney is a pretty girl but iggy is NOT a pretty girl. Iggy was thirsty and desperate for the camera in the music video like b---h fall back aint nobody wanna see your ugly face. Britney of course lookee gorgeous but tbh britney should have worked with a PRETTY GIRL like Rihanna, Katy perry or even Gaga but instead she works with iggy who is not pretty UGH