He told Britain's Daily Telegraph magazine: "When I was 10 my stepfather bought me some shares in Wal-Mart. It was my first lesson in money. He taught me the right way to spend and save. I like nice things but when I'm in a store, I usually talk myself out of buying anything."
The 25-year-old, who was previously a member of the boyband 'N Sync, also claims he was raised to be humble - a quality he has preserved despite becoming one of the biggest pop stars in the world.
He said: "I was always removed from the whole idol thing. I cared so much about what I did that stuff didn't register. My parents instilled in me the mindset of always being humble, so I'd like to believe that all the teen idol stuff went in one ear and out of the other."

Meanwhile. Britney Spears' estranged husband Kevin Federline shocked audience members at Justin Timberlake's Las Vegas gig on Friday night when he showed up at the concert reports China Daily.

Timberlake was in Sin City to perform at the MGM Grand, while Federline was in town to check out the World Extreme Cagefighting matches at the Hard Rock Hotel.

They both were spotted at Tao nightclub on Thursday, where Federline spent most of his time in the VIP section at a table next to some of Timberlake's dinner companions.

According to one club-goer, "He wasn't drinking much and really only talked to a couple of his friends. It seems like he's trying to move on from past Vegas visits where it was all about the bling-bling."