Backstreet Boys' A.J. McLean defends Nick Carter after arrest: 'We all make mistakes'

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Nick Carter Arrested After Alleged Bar Fight in Florida

Earlier this month, Backstreet Boys singer Nick Carter was arrested for allegedly getting into a bar fight in Key West, Florida. Now, his friend and former bandmate, A.J. McLean, is coming to Carter's defense.

"We're all human, we all make mistakes, we all put our pants on the same as everybody else," McLean told ET at the premiere of The Finest Hours in Hollywood on Monday.

"It's just sad now because of social media... there's no way to keep anything secret. If you mess up, everybody knows," McLean added. "For me, back when I was really kinda messing up, there wasn't Facebook and Instagram and Twitter, so mine was all kind of in-house. Now, it's sad. You really can't get away with anything."

WATCH: Nick Carter Breaks His Silence After Arrest for Florida Brawl

McLean has been outspoken about his battle with addiction in the past, including three stints in rehab. The 38-year-old singer has been proudly living clean and healthy for several years. Carter has had a similar history of addiction, and he's frequently spoken about how he managed to overcome his vices.

On Jan. 13, Carter was placed in custody on one count of misdemeanor battery after allegedly getting into an altercation at the Hog's Breath Saloon. According to McLean, the arrest and subsequent media response will be "a learning experience" for Carter.

See photos of Nick Carter from over the years:

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Backstreet Boys' A.J. McLean defends Nick Carter after arrest: 'We all make mistakes'
American boyband The Backstreet Boys at the MTV Awards in New York City, 4th September 1996. They are Brian Littrell, Nick Carter, A. J. McLean, Howie Dorough and Kevin Richardson (Photo by Tim Roney/Getty Images)
Nick Carter from the Backstreet Boys (Photo by Fred Duval/FilmMagic)
MIAMI BEACH, FL - APRIL 1997:The Backstreet Boys (L - R) Kevin Richardson, Howie Dorough, Brian Littrell, AJ McLean and Nick Carter pose for an April 1997 portrait in Miami Beach, Florida. (Photo by Bob Berg/Getty Images)
MIAMI BEACH, FL - APRIL 1997:Nick Carter of the Backstreet Boys poses for an April 1997 portrait in Miami Beach, Florida. (Photo by Bob Berg/Getty Images)
(clockwise fr. top L) Singers Kevin Richardson, Brian Littrell, Howie Dorough, Nick Carter and A. J. MccLean of musical group Backstreet Boys. (Photo by Mirek Towski/DMI/The LIFE Picture Collection/Getty Images)
LOS ANGELES - JANUARY 26: Pop group Backstreet Boys: Howie Dorough, Brian Littrell, A.J. McLean, Nick Carter and Kevin Richardson attend the 25th Annual American Music Awards on January 26, 1998 at the Shrine Auditorium in Los Angeles, California. (Photo by Ron Galella, Ltd./WireImage)
Nick Carter of the Backstreet Boys (Photo by Ron Galella/WireImage)
LOS ANGELES - FEBRUARY 24: Singers Howie Dorough, Nick Carter and A.J. McLean of the Backstreet Boys attend the 41st Annual Grammy Awards on February 24, 1999 at the Shrine Auditorium in Los Angeles, California. (Photo by Ron Galella, Ltd./WireImage)
LAS VEGAS - DECEMBER 7: Pop group Backstreet Boys: Brian Littrell, Howie Dorough, Kevin Richardson, Nick Carter and A.J. McLean attend the Ninth Annual Billboard Music Awards on December 7, 1998 at the MGM Grand Garden Arena in Las Vegas, Nevada. (Photo by Ron Galella, Ltd./WireImage)
Aaron Carter & Nick Carter (Photo by Jeff Kravitz/FilmMagic)
LOS ANGELES - JANUARY 8: Singer Nick Carter of the Backstreet Boys attends the 28th Annual American Music Awards on January 8, 2001 at the Shrine Auditorium in Los Angeles, California. (Photo by Ron Galella, Ltd./WireImage)
LOS ANGELES - JANUARY 8: Pop group Backstreet Boys: Brian Littrell, Kevin Richardson, A.J. McLean, Howie Dorough and Nick Carter attend the 28th Annual American Music Awards on January 8, 2001 at the Shrine Auditorium in Los Angeles, California. (Photo by Ron Galella, Ltd./WireImage)
Backstreet Boy Nick Carter gets ready to put a pie in the face of brother, and award winner for Favorite Rising Star, Aaron Carter at the Nickelodeon's 14th Annual Kids' Choice Awards at Barker Hanger in Los Angeles, CA., Saturday, April 21, 2001.(photo by Kevin Winter/Getty Images)
Backstreet Boy Nick Carter puts a pie in the face of brother, and award winner for Favorite Rising Star, Aaron Carter at the Nickelodeon's 14th Annual Kids' Choice Awards at Barker Hanger in Los Angeles, CA., Saturday, April 21, 2001.(photo by Kevin Winter/Getty Images)
Nick Carter & Aaron Carter (Photo by SGranitz/WireImage)
NEW YORK CITY - JULY 2: Singer Nick Carter of the Backstreet Boys performs at 'The Today Show' Summer Concert Series on July 2, 2001 at Rockefeller Center in New York City. (Photo by Ron Galella, Ltd./WireImage)
Kevin Richardson, AJ McLean, Nick Carter, Howie Dorough and Brian Littrell of the Backstreet Boys (Photo by Jeff Kravitz/FilmMagic, Inc)
Nick Carter of Backstreet Boys during MTV's Rock 'N Jock NBA All-Star Jam at Philadelphia Convention Center in Philadelphia, Pennsylvania, United States. (Photo by Theo Wargo/WireImage)
Nick Carter, Paris Hilton and Damon Thomas during 2004 ESPY Awards - Jamie Foxx After Party at Skybar at The Mondrian in Los Angeles, California, United States. (Photo by M. Caulfield/WireImage)
Nick Carter and Paris Hilton during PS2 and Jay-Z Celebrate the Launch of the S. Carter Tennis Shoe at Playstation 2 Estate in Bridgehampton, New York, United States. (Photo by Debra L Rothenberg/FilmMagic)
Paris Hilton and Nick Carter during PS2 Estate Day 3 - 6th Annual P. Diddy White Party at PS2 Estate in Bridgehampton, New York, United States. (Photo by Shareif Ziyadat/FilmMagic)
Paris Hilton and Nick Carter during MTV Movie Awards 2004 - Arrivals at Sony Pictures Studios in Culver City, California, United States. (Photo by Albert L. Ortega/WireImage)
Nick Carter, Paris Hilton, Nicky Hilton and Aaron Carter (Photo by J. Vespa/WireImage)
NEW YORK, NY - SEPTEMBER 04: Nick Carter of Backstreet Boys and wife Lauren Kitt Carter visit the SiriusXM Studios on September 4, 2014 in New York City. (Photo by Taylor Hill/Getty Images)
BERLIN, GERMANY - JULY 24: (EXCLUSIVE COVERAGE) Nick Carter (L) sighted on July 24, 2014 in Berlin, Germany. Carter is enjoying some private time in Berlin after the tour of his band The Backstreet Boys was canceled. (Photo by Karadshow/GC Images)
LONDON, ENGLAND - JULY 06: Nick Carter (L) and AJ McLean (R) Nick Carter; of The Backstreet Boys perform on stage at British Summer Time Festival at Hyde Park on July 6, 2014 in London, United Kingdom. (Photo by Tristan Fewings/Getty Images)
LONDON, ENGLAND - JULY 06: Nick Carter and AJ McLean of Backstreet Boys perform on stage at British Summer Time Festival at Hyde Park on July 6, 2014 in London, United Kingdom. (Photo by Dave J Hogan/Getty Images)
LAS VEGAS, NV - MAY 30: AJ McLean, Nick Carter, Kevin Richardson and Howie Dorough arrive at Chateau Nightclub & Rooftop inside Paris Las Vegas on May 30, 2014 in Las Vegas, Nevada. (Photo by Mindy Small/FilmMagic)
MOUNTAIN VIEW, CA - MAY 25: Singer Nick Carter of the Backstreet Boys performs during the 'In a World Like This' summer tour at Shoreline Amphitheatre on May 25, 2014 in Mountain View, California. (Photo by C Flanigan/Getty Images)
MOUNTAIN VIEW, CA - MAY 25: (L-R) Kevin Richardson, Brian Littrell, Nick Carter, Howie Dorough and AJ McLean of Back Street Boys are performing at Shoreline Amphitheatre on May 25, 2014 in Mountain View, California. (Photo by Miikka Skaffari/FilmMagic)
LAS VEGAS, NV - FEBRUARY 08: Singer Nick Carter (R) of the Backstreet Boys and his fiancee Lauren Kitt celebrate their coed bachelor and bachelorette party at Ghostbar at the Palms Casino Resort on February 8, 2014 in Las Vegas, Nevada. (Photo by David Becker/WireImage)
LAS VEGAS, NV - FEBRUARY 08: Singer Nick Carter (R) of the Backstreet Boys and his fiancee Lauren Kitt celebrate their coed bachelor and bachelorette party at Ghostbar at the Palms Casino Resort on February 8, 2014 in Las Vegas, Nevada. (Photo by David Becker/WireImage)
LAS VEGAS, NV - FEBRUARY 08: Singer Nick Carter of the Backstreet Boys (R) and his fiancee Lauren Kitt arrive to celebrate their coed bachelor and bachelorette party at Ghostbar at the Palms Casino Resort on February 8, 2014 in Las Vegas, Nevada. (Photo by Gabe Ginsberg/FilmMagic)
LOS ANGELES, CA - JULY 31: Singer Nick Carter of the Backstreet Boys performs at the 2013 summer concert series at The Grove on July 31, 2013 in Los Angeles, California. (Photo by Chelsea Lauren/WireImage)
LAS VEGAS, NV - JULY 03: Singer Nick Carter of Backstreet Boys and his girlfriend Lauren Kitt shop at Sugar Factory at Paris Las Vegas on July 3, 2011 in Las Vegas, Nevada. (Photo by Angela Weiss/WireImage)
CULVER CITY, CA - JUNE 5: Singer Nick Carter and tv personality Paris Hilton arrive to the 2004 MTV Movie Awards at the Sony Pictures Studios on June 5, 2004 in Culver City, California. The 2004 MTV Movie Awards will air on the MTV Network June 10, 2004 9 PM (ET/PT). (Photo by Frank Micelotta/Getty Images)
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"I know he's probably going through a lot," McClean said. "He's about to become a brand new father so it takes a toll on you, but I know he's going to be an amazing father. He's an amazing husband, he's a great kid, I love him to death."

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"Again, he's only human so everyone lay off the kid alright?" McClean added.

Aside from this legal setback, things are looking up for the recent Dancing With the Stars runner-up. Not only is he preparing to welcome his first child with wife Lauren Kitt, but he and McLean will appear on an upcoming episode of Lip Sync Battle together after their pal, Gigi Hadid, asked for their help.

"We met Gigi for the very first time at the Balmain event up in New York, and she asked us to do it and I'm like, 'Of course!'" McClean explained. "So, I said, 'The next time the Backstreet Boys have any kind of video, you gotta return the favor and be the main girl in one of our videos,' and she said, 'Absolutely, for sure.'"

WATCH: Police Say Nick Carter 'Appeared Intoxicated' Upon Arrest at Key West Bar

The Backstreet Boys will also appear on the live season finale of Undateable on Friday at 8 p.m. ET/PT, 7 p.m. CT on NBC.

On Saturday, Carter broke his silence about his arrest on Twitter, writing "When we fall we have to get up and keep on walking." For more on the singer's heartfelt message to his fans, check out the video below.

Nick Carter Apologizes After His Bar Arrest: 'I Am Human'

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