The 36-year-old posed for the cover of the September issue of Treats! magazine, reports a website.
"I've done some topless photo shoots before, but never completely nude," Thicke said.
"It was very sexy and I like that. At first I thought, ‘Okay, let's just do topless' ... but, again, my wife and her friends were like, ‘No way ... go all the way.' I think we definitely pushed the envelope," he added.
The singer was recently in news for sharing the stage for Miley Cyrus's raunchy performance at the MTV Video Music Awards.