WATCH: Heidi Montag Still in Pain One Year After Surgery

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In November 2009, reality star Heidi Montag made the decision to have 10 plastic surgery procedures in one day. Now, she's sharing her post-operation regrets with ET in an exclusive interview.

"This past year has been the hardest year and craziest year of my life," Heidi tells ET while at a photo shoot for Life&Style magazine. "It's been a year since my surgery and that's really when my life and whole world kind of turned upside down."

The reality star underwent a laundry list of procedures: a mini brow lift; Botox in her forehead; a nose job; fat injections in her cheeks; a chin reduction; neck liposuction; her ears pinned back; liposuction on her waist, hips and thighs; butt augmentation and her second breast augmentation. "When I look in the mirror today, I don't really know who I see. It is me and it's not me. It's a very weird situation," she admits. "Sometimes I'll run across an old photo and it's actually shocking sometimes because I've been three different people. I've had three different faces."

Heidi discloses that even a year after her procedures, she still experiences some discomfort. "Sometimes I wake up at night and I have chest pain, and... if I exercise a lot then I get sharp pains in my breasts sometimes. A lot of my scars won't ever go away."

See Heidi's scars exposed when Life&Style magazine hits newsstands Friday.

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