Any remaining doubts about what style direction Miley Cyrus is heading in were finally put to rest last night — and right here in Toronto, no less. It’s now official: Hannah Montana is R.I.P. and Miley is morphing into … Hilary Duff?

Well, maybe not so much, but the teen queen sure poked a finger in the eye of everyone who’s been criticizing her less-than-modest fashion choices lately.

Miley turned up in Toronto to co-host the annual MuchMusic Video Awards and turned up the heat immediately by hitting the outdoor stage in this fishnet monokini over a silver lamé bra and what appeared to be black leather boyshorts. Talk about making a statement. Take that, Rihanna: this good girl’s gone wicked!

As if her public display of lingerie wasn’t enough to set heartbeats racing, Miley was joined onstage for a frenetic version of “Party in the U.S.A.” by hometown hearthrob Justin Bieber. I swear, it’s hard to tell what’s changing faster, JBieb’s voice or Miley’s wardrobe — not that anyone seemed to mind.

Altogether, a bold, boundary-pushing moment for Miley, who accomplished the impossible feat of making other MMVA celebs like Kay Perry and The Situation seem overdressed for Toronto’s biggest street party of the year.