Justin Bieber dyes his hair purple, shows off new 'do in series of nearly naked selfies

Justin Bieber Flaunts His Purple Hair (and Killer Abs) in Sexy Shirtless Selfie

Daaaaamn, Justin Bieber!

On Saturday, Bieber posted a nearly naked locker room selfie with the caption, "Back in the gym," and we're not sure what to focus on first: The fact that he dyed his previously platinum hair purple, or that he's showing off his new 'do -- and insane abs! -- while wearing nothing but a towel.

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back in the gym,

A post shared by Justin Bieber (@justinbieber) on

SEE MORE: Everything You Need to Know About Justin Bieber and Hailey Baldwin's Steamy Romance

Moments later, the 21-year-old pop star followed up with another mirror shot of his buff body:

The "Sorry" singer has yet to reveal what inspired the new hue, but he first showed off his lilac locks on Friday while posing with his Ferrari.

SEE MORE: Meet the Sorority Girl Justin Bieber's Family Hired as a Nanny

ET recently sat down with celebrity pastor Rich Wilkerson Jr., who told us that Bieber has "a heart of gold." "He's been thrown into a whirlwind that I'll never know and so I think on his journey he's always trying to figure it out," Wilkerson said.

RELATED: The evolution of Justin Bieber

The Evolution of Justin Bieber
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Justin Bieber dyes his hair purple, shows off new 'do in series of nearly naked selfies
Canadian pop megastar Justin Bieber (C) plays basketball with a young survivor of Super Typhoon Haiyan in Palo, Leyte province on December 10, 2013. Pop megastar Justin Bieber sang to and played basketball with young survivors of the Philippines' deadliest typhoon on December 10 after he flew into the disaster zone to boost an international relief effort. AFP PHOTO (Photo credit should read STR/AFP/Getty Images)
LOS ANGELES, CA - JULY 27: The winner of Champ of Charity singer Justin Bieber (L) and singer Cody Simpson onstage at the 2014 Young Hollywood Awards brought to you by Samsung Galaxy at The Wiltern on July 27, 2014 in Los Angeles, California. The Young Hollywood Awards will air on Monday, July 28 8/7c on The CW. (Photo by Frederick M. Brown/Getty Images for Variety)
The "Baby" singer headed straight to the salon for a new makeover ... this time going blonde! (Instagram)
LOS ANGELES, CA - AUGUST 23: Justin Bieber attends a VMA Pre-Party hosted by Chris Brown & Pia Mia featuring Bera on August 23, 2014 in Los Angeles, California. (Photo by Araya Diaz/Getty Images)
NEW YORK, NY - JAN 17: General view of a Justin Bieber for Calvin Klein Billboard located on Houston Street on January 17, 2015 in New York City. (Photo by Tomas/IMAGES/Getty Images)
LAS VEGAS, NV - MARCH 15: Singer Justin Bieber arrives at Omnia Nightclub at Caesars Palace to celebrate his birthday on the nightclub's opening weekend on March 15, 2015 in Las Vegas, Nevada. (Photo by Gabe Ginsberg/Getty Images)
CANNES, FRANCE - NOVEMBER 07: Singer Justin Bieber attends the 17th NRJ Music Awards ceremony at Palais des Festivals on November 7, 2015 in Cannes, France. (Photo by Marc Piasecki/WireImage)
LOS ANGELES, CA - JANUARY 18: Justin Bieber and Corey Gamble are seen in Beverly Hills, Ca on January 18, 2016 in Los Angeles, California. (Photo by Light Brigade/Bauer-Griffin/GC Images)

Find out what else he said about Bieber's spiritual journey in the below video:

Inside Justin Bieber's Emotional Baptism in NBA Pro Tyson Chandler's Bathtub
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