“When was the last truly f*cking nasty, nasty, bad pop girl?” This is the question posed in the teaser trailer to HBO’s The Idol, which promises the kind of lurid, adrenaline-pumping pop-culture exposé you’d see if Paul Verhoeven was ever allowed to make a film like Showgirls again. Said trailer also features copious quantities of cocaine, champagne and seriously dirty dancing, suggesting a warts-and-all drama about a super-ambitious Madonna/Lady Gaga type who has recently hit the big time in the dog-eat-dog world of showbiz.