I think the skin revolution for women, I will call it, really all started with Mariah Carey. Madonna was pretty risqué too, but she was pretty much always known as a "bad girl." Mariah was a good girl, supposedly Christian, turning very bad, in the late 90's. So then, all the other little girls and teens and women across America thought it would be ok for them to "come out" too essentially, or flaunt whatever they had. Modesty went completely out the window for many women, starting in the late 90's.
Pop stars AREN'T cool. Cheating on your husband or your wife isn't cool. Having no modesty with your body and no self-respect is NOT cool. It doesn't matter how pretty someone's voice is, or if they SAY they are Christian, God calls us to modesty and faithfulness, so we need to be careful to not idolize anyone that goes way off of what God wants.