Marc Jacobs. Photo: Getty Images

Marc Jacobs just came out of the closet on his hair transplant.

In this month's interview with Details, the fashion designer known for his hip-luxe styles confessed that he underwent a hair transplant in May, and it was even more painful than getting tattoos.

"I didn't cry over those," Jacobs says in the Details story, referring to how much worse the hair transplant was than the tattoos. "I couldn't sleep on my side, and I couldn't put my head back."

According to Jacobs, his new hairline is part of self-induced makeover that he started three years ago, when he overhauled his diet and exercise routine and started taking care of his skin and hair.

Jacobs now enjoys regular facials, full-body massages, mani's and pedi's as well as a full skin care regime that includes Dr. Brandt Time Arrest Eye Serum, Joëlle Ciocco cleansers, toners and moisturizers and Yves Saint Laurent Teint Parfait Complexion Enhancer #7 to conceal the dark circles under his eyes.

No surprise to us, given how much Jacobs likes to party.

We hear the primping designer also gets his teeth whitened at the dentist's office once a year, and uses a special Rembrandt toothpaste that is formulated to lighten up tough smoker stains.

And not surprisingly, the finishing touch is always the designer's newly minted Bang fragrance, which Jacobs says he strategically blended with pepper and white moss.

"I always smell like smoke. I happen to like the smell of fragrances on smokers," Jacobs told Details.

The Bang campaign was equally smokin' and filled with plenty of controversy. Check out our coverage of the skin-baring ads.