Justin Bieber's father is ''proud'' of the size of the star's penis.

The 21-year-old singer has threatened to take legal action after three full frontal nude photographs of him taken while he was on holiday with rumoured British girlfriend Jayde Pierce in Bora Bora surfaced online on Wednesday (07.10.15), but it seems Jeremy Bieber is less upset about his son's privacy being invaded.

He took to Twitter to praise the 'Where Are U Now' hitmaker's manhood, tweeting: ''@justinbieber what do you feed that thing. #proud daddy''

While Justin was initially very unhappy and felt violated by the images, a source told gossip website TMZ.com that he cooled off after they went viral because he thinks they are very flattering.

The Canadian heartthrob's personal-trainer Patrick Nilsson previously claimed he was ''well-endowed'' despite rumours his Calvin Klein underwear campaign had been photoshopped to give him a bigger package.

Speaking last year, he said: ''I can definitely confirm that he is a well-endowed guy. I sound weird saying that, but yes.''

Justin was also forced to defend his physique last March after he was accused of relying on photoshop when he appeared topless on the cover of Men's Health magazine.

He tweeted at the time: ''I love the fact that I got in shape the past two years, and I'm finally getting recognition for it. It's not photoshopped for all you fools out there saying it's photoshopped.''