Bad Male Manes

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Kevin Federline

Seen here in 2006 with a cornrow mullet, single dad Federline's look was the result of an act of charity, according to his publicist, Marilyn Lopez. "He just chopped off 10 inches of hair for Locks of Love," Lopez told E!'s Ted Casablanca at the time.

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Russell Brand

Tart-tongued comic Brand, who hosted MTV's 2008 Video Music Awards and appeared in Forgetting Sarah Marshall, says his mane is very high-maintenance. "My hair is a very powerful construction aided by static, hairspray and willpower,' he told the U.K.'s Daily Mirror. "In man hours, it's comparable to the pyramids."

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Nick Nolte

Nolte showed off a disheveled 'do in his booking photo for a DUI arrest in 2002. "A lot of people think I'm insane," the actor told Steppin' Out after his arrest made headlines. "And that drunk-driving photo of me doesn't help. But what a lot of people don't know is that I had just finished filming The Hulk. That's the hair I had from the movie!"

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Clay Aiken

Idol's season two runner-up underwent a dramatic style transformation during his stint on the FOX series in 2003 -- and continued to surprise fans when he returned to the stage for a 2006 performance with a piecier flatironed style. "Since the beginning he's had four different hair colors!" Idol hairstylist Dean Banowetz joked to Extra of Aiken's style evolution.

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Brad Pitt

"I was just really concerned that I had not been getting enough publicity. I wanted to do something to draw more attention," Pitt joked to Us of his motivation to dye his hair blond.

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Mickey Rourke

Rourke showed off his rocker-esque stringy style at the 2009 Screen Actors Guild Awards.

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Lenny Kravitz

"[My look] is not calculated at all," Kravitz told VH1 of his grooming habits. "It's just hair. Back in the day when I grew up in Brooklyn, all the dudes on the block had the straight hair going. It's something I always wanted to do. I was thinking back to my childhood and these guys that were like the guys I looked up to when I was a kid."

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Brandon Davis

Oil heir Davis -- dubbed "Greasy Bear" by gossip bloggers due to his unruly mane -- fails to keep his tresses in check, according to the New York Post. During a visit to a high-end New York City salon, Davis' hair was so oily that stylists reportedly wore gloves to style his 'do!

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John Mayer

Mayer says his 2008 'do was a throwback to '80s TV icon Alex Keaton from Family Ties. "The feathered cut projects an attitude of ease and quiet confidence that seems to have all but eluded our generation," Mayer blogged after chopping his locks. "[It] is a work in progress, and as my hair grows longer it will serve to become a more stirring and poignant statement."