The gift that keeps on giving?

Heidi Montag - who came under fire for undergoing 10 plastic surgery operations in one day - says not only was her mother supportive of her drastic operation, but she plans on giving her a "mommy makeover" for Mother's Day.

Reports surfaced that Montag's mother, Darlene Egelhoff, was furious at her daughter for secretly going under the knife. (Montag, 23, had breast implants, a brow lift, botox in her forehead, a nose job revision, fat injections in her cheeks, a chin reduction, neck liposuction and had her ears pinned back.)

But The Hills star tells Nightline that her mother was aware of her plan.

"I've had this conversation with her several times. So I think she knew," she says. "I already heard what she had to say."

Montag says the only thing she didn't tell her mother was the date of her surgery because "I didn't want it to be a circus. And I didn't want it to be crazy media outside my house."

Montag says her mother wants surgery next.

"Actually, she was excited for me and she's asking me ... for her surgery next," says Montag. "So for Mother's Day, I have to ask [surgeon] Dr. Frank Ryan if he'll do the mommy makeover."