Khloe Kardashian got very candid on Sunday's "Watch What Happens Live!"

The 31-year-old "Keeping Up With the Kardashians" star revealed a number of surprising things, including the fact that she recorded a sex tape with her ex, Lamar Odom, and her own cosmic surgery habits.

WATCH: Khloe Kardashian Posts Nip Pics, Reveals Secret Behind Her 11-Pound Weight Loss

Khloe sat down with Andy Cohen for the no-holds-barred conversation, where she opened up about her past sex tape.

"I've definitely recorded myself having sex with my ex-husband," Khloe said, referring to Lamar, "But not like, talking to camera."

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While Khloe could have been be talking about any number of celebrity sex tapes, she might have been making a subtle dig at her sister Kim for her infamous sex tape with rapper Ray J, released years ago.

WATCH: Khloe Kardashian Poses Completely Nude for Cover of Her New Book, 'Strong Looks Better Naked'

Khloe added that she still has the tapes she made with Lamar "in my safe."

She also gave an update on her ex's health, revealing that the 36-year-old former NBA star is "advancing" after spending months in the hospital.

"All of a sudden, he's walking," Khloe shared. "Doctors are astonished."

WATCH: Khloe Kardashian Says Lamar Odom Doesn’t Know Why He’s in the Hospital: 'It Would Set Him Back'

Regarding plastic surgery, Khloe was just as candid, sharing her secret to fuller lips: "Laser treatments."

"I've done laser plumping for my whole face," Khloe explained. "I do, like, lipolaser on my body. I do everything."

Khloe also runs through a list of questions about the plastic surgery that members of her family have undergone, revealing that no one in the Kardashian-Jenner clan has gotten a nose job or butt implants, but someone (other than Kourtney) received breast augmentation surgery and hair transplants, but the "Strong Looks Better Naked" author wouldn’t name names.

WATCH: Khloe Kardashian Bares Her Naked Butt in Glitter-Covered 'Revenge Body' Pics

Recently, Khloe opened up with ET about the challenges of making time for her high-profile relationship with NBA star James Harden. Check out the video below to hear what the reality star had to say.