The singer also opens up about being a father in "Hindsight."
Justin Timberlake's taking stock of his life so far in a book filled with never-before-shared photos and stories from his time in the spotlight.
Out today, "Hindsight: & All the Things I Can't See in Front of Me," is packed with "anecdotes, reflections, and observations on his life," along with candid images of him as a child, on the road with *NSYNC, his solo years and as a husband and father to wife Jessica Biel and son Silas.
Timberlake recalled finding out about the auditions for "The Mickey Mouse Club" while driving back home from his time on "Star Search." He and his mother turned back around and tried out.
After performing a sketch and one of the songs he did for Ed McMahon, he was asked, "Why do you want to be on the Mickey Mouse Club'?" His answer: "I'm in it for the money."
Apparently, that did the trick, because he ended up being on the show alongside Ryan Gosling, Britney Spears and Christina Aguilera. "I loved being on that show. We had a very good time on set -- and off," wrote Justin. "We had employee cards that gave us access to the theme parks for free. Ryan and I once stole a golf cart and drove it to the employee entrance for the Tower of Terror. We went on that ride twelve times in a row. We got reprimanded for that, it was worth it."
While the boys of NSYNC would become world wide superstars and one of the biggest bands of all time, Justin noted there were some "weird" moments during their rise to fame as well.
"One time we got booked for the wrong festival somewhere in Scandanavia. The festival consisted of a bunch of heavy metal acts and 'this up and coming boy group from the USA,'" he wrote. "We spent our twenty-five minute set dodging glass bottles being thrown at us by tall, blond, heavily tattooed people."
He also recalled one time he did a benefit concert with Mick Jagger where he was, once again, the odd man out. "When I arrived, I realized that I was the only artist there who would call himself a 'pop' act. I walked onstage to beer cans and bottles of urine being thrown at me. Bottles. Of. Urine," he explained.
Timberlake added that even Jagger had stuff thrown at him on stage though, and the Rolling Stones frontman blamed the "silly AC/DC fans" for the commotion.
Though he only mentions Britney by name once while referring to his "MMC" costars, Timberlake does write in detail about his one song that's reportedly about her: "Cry Me a River."
While talking about the writing process, he recalled feeling "scorned" and "pissed off," adding that those feelings "inspired me to write 'Cry Me a River.'"
"I wrote 'Cry Me a River' in two hours. I didn't plan on writing it," he continued. "The feelings I had were so strong that I had to write it, and I translated my feelings into a form where people could listen and, hopefully, relate to it. People heard me and they understood it because we've all been there."
"When I met Jess, it was undeniable how beautiful she is," wrote Timberlake, before explaining how they met at a speakeasy-type bar.
"I made some sort of sarcastic comment, really dry. Nobody got it except her," he continued. According to Justin, they talked all night, danced to "Lucky Star" and parted ways without exchanging phone numbers.
He kept thinking about her though and, eventually, she came to one of his shows with a mutual friend. Timberlake offered them all a ride home from San Diego to Los Angeles on his tour bus and the two "talked the whole way up, joking around." That night he got her number and the rest is history.
"She's become a huge influence on my life," he added, "and I have such admiration for her, especially seeing her as a mother now."
Timberlake recalled the moment his "life changed forever" after getting a text from Biel while on the road for The 20/20 Experience World Tour.
"It read 'CALL ME NOW.' I FaceTimed her back immediately. She answered with this look on her face, and I knew exactly what she was going to say," he explained. "Instead, she just held up the pregnancy test, and we both started bawling."
The two welcomed Silas in 2015, with Timberlake calling fatherhood "the pinnacle of my life."
While the couple have shared a few photos of him on social media, they've been few and far between, with his face usually obscured.
"It was important for us to choose how to share him with the world because this is a whole new era for me," wrote Justin. "It's no longer just about me. I have a wife, a child - a family. It's terrifying. It's invigorating. It's more meaningful than anything I've ever been a part of."