Troye Sivan is The Idol.Whether on stage, in music videos or stunting at The Met Gala, the 27-year-old Australian singer/songwriter has been serving his slender style sass since first blooming onto the scene a decade ago.So, while it should be no surprise that Sivan is a sartorial wizard, this week he really stepped up his fashion game with an arsenal of killer fits to promote his role in HBO’s new series The Idol at the Cannes Film Festival.“I hope he realizes how unbelievably influential he’s been.”The show explores the sleazy underbelly of Hollywood stardom, with Sivan playing the creative director of a “nasty, nasty, bad pop-girl” portrayed by Lily-Rose Depp. Peep the trailer:Taking a cue from show’s seedy glitz, the “Bloom” singer perfectly encapsulated the vibe with a slew of edgy looks that devoured every red carpet Sivan stormed.For a daytime photocall, Sivan channeled a naughty schoolboy with a billowy Valentino blouse and and a pair of black shorts.