One supposes “The Idol” is going for an edgy commentary on the cynicism of show business and our obsession with the personal lives of pop stars, but it seems to be wallowing in the material rather than offering any kind of insight. Jocelyn’s outfits are about as substantial as a pair of shoelaces, and she seems equal parts bemused and disinterested in all the madness surrounding her, even after a scandalous photo of her is leaked, and her team scrambles to exert damage control. (The talented but wasted cast also includes Dan Levy as Jocelyn’s publicist; Eli Roth as a Live Nation executive; Hank Azaria and Da’Vine Joy Randolph as her co-managers, and Rachel Sennott as Jocelyn’s best friend and assistant.)

Lily-Rose Depp has a magnetic screen presence and does what she can with the role, but she’s stuck playing a third-rate version of the cliched troubled pop star we’ve seen in “The Rose” and various iterations of “A Star Is Born.”

“The Idol” segues from being an unfunny version of “Entourage” to something like an old episode of “Red Shoe Diaries” when Jocelyn meets a nightclub manager named Tedros (played quite terribly by Abel Tesfaye, aka The Weeknd, whose line readings are stiff and amateurish), who immediately casts some kind of spell on her, even though anyone who spends more than five minutes with this guy could see he’s a creepy poser. (When Jocelyn’s assistant later tells her Tedros has a “rapey” personality, she agrees — and says that’s why she’s intrigued by him.)