Miley Cyrus Turns 'Carpool Karaoke' Into a Confessional: Weed, VMAs and a 'Voice' Hit-and-Run
50 of Miley Cyrus' Sexiest Looks

"Malibu" singer says she was super high while filming her naked "Wrecking Ball" music video.

Miley Cyrus turned James Corden's "Carpool Karaoke" into a confessional Tuesday night.

When the 24-year-old pop star wasn't belting out some of her biggest hits -- including "Party in the USA," "We Can't Stop," "The Climb," "Wrecking Ball" and "Malibu" -- she was busy talking to the "Late Late Show" host about her life, starting with how bad of a driver she is.

"I'm a f-cking terrible driver. All of the wrecks I've ever had have pretty much been in my own driveway, because I can't even get out of the driveway without having any," she said, then detailed a "hit-and-run" on the set of NBC's "The Voice."

She also used the popular late-night TV segment as a platform to explain how her infamous 2013 MTV VMAs performance with Robin Thicke led her to activism.

"I realized if that many people were going to talk about something that I did, or something that I do, then I should make it a good thing," Cyrus said. "And I should make it something that can change people's lives rather than be a controversial conversation that does nothing but become a fun Halloween costume for people."

Corden then asked Cyrus how high she was during that performance, to which she replied, "Actually zero."

"I can’t smoke before I go on stage, I get too scared," she said. "That’s just me. That’s how insane I am. That’s just normal."

But she was super high while filming her naked "Wrecking Ball" video.

"10," she told Corden.

Enjoy Cyrus singing "Wrecking Ball" completely sober below.

View Photos Getty Miley Cyrus' Crazy VMA Looks

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