Wiz Khalifa thinks Miley Cyrus is “insane in a good way”.

The 26-year-old rapper is currently working on his sixth studio album, Blacc Hollywood, which will hit shelves later this year.

Wiz reveals he and Miley collaborated on a few songs together for the forthcoming LP, and working with her was out of this world.

“Insane! But in a good way though, she’s just a ball of energy,” the emcee shared during a Monday night appearance on The Arsenio Hall Show.

Both Wiz and Miley have been very open about their marijuana usage in the past, publicly declaring their love for the drug.

But The Young, Wild & Free rapper is shocked by how much of the narcotic his 21-year-old colleague can ingest.

“She smokes a ton,” Wiz said, noting several marijuana smoking sessions were taking place while they worked together in the studio.

“Every five minutes she kept being like, ‘Hey Wiz, you don’t have a joint rolled? What’s up?’ She was just blowin’ like a train.”

In the September 2013 issue of Rolling Stone, Miley detailed her drugs use habits in detail.

"I think weed is the best drug on earth. One time I smoked a joint with peyote in it, and I saw a wolf howling at the moon," she boasted to the magazine. "Hollywood is a coke town, but weed is so much better. And molly, too. Those are happy drugs - social drugs. They make you want to be with friends. You're out in the open. You're not in a bathroom. I really don't like coke. It's so gross and so dark. It's like what are you, from the 90s? Ew."