Backstreet Boys' A.J. McLean Defends Nick Carter After Arrest: 'We All Make Mistakes'

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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 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, California 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.

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

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.