David Beckham knows a thing or two dozen about posing in one's underwear.
The studly soccer star caused an online heat wave last summer when he stripped nearly all the way down for H&M.
So who better to ask for perspective on Justin Bieber's recent Calvin Klein campaign than the sizzling father of four?
What does the Beckham think of the Biebs?
"Not bad, not bad, not bad," Beckham told E! News this week. "He looks good in his underwear ads. He looks very good."
As hard as it may be to believe, Beckham is actually turning 40 years old in May, though he insists this milestone birthday isn't a big deal.
"I'm not worried about turning 40," he says. "People keeping turning around and saying, 'You're turning 40 - how do you feel?' And I'm like, 'I feel fine. I'm looking forward to it.' I just don't want a big party because I don't like that kind of attention, but I'll do a quiet dinner with friends."
That's fair. But readers may wanna throw a party over Beckham taking most of his clothes off in the following photo gallery:
And now Bieber for Calvin Klein: