'There was something about this photo lu took ,that seemed worthy of instagram,' Michael noted of the shot, taken by his wife, Luisana Lopilato, 27.
The father-of-one followed that remark with a series of hashtags, in case it hadn't been clear what he was talking about: '#myhumps #babygotback #hungryshorts #onlyinmiami #picoftheday #beautifulbum'
But while the Haven't Met You Yet singer thought it was a harmless joke, plenty of followers on Instagram and Twitter took quite the offense to the photo.
Michael was bombarded with angry messages, such as one Twitter user who wrote: 'That's someone's daughter, dude.'
He has since responded to the controversy in a statement to UsWeekly, saying: 'I do not court controversy, but I realize that a photo that was meant to be complimentary and lighthearted has turned into a questionable issue.'
The Canadian star added: 'It hurts me deeply that anyone would think that I would disrespect women or be insulting to any human being... I regret that there are people out there who found the photo offensive.'
'That was not and is not my intention. Women are to be celebrated, loved, respected, honoured and revered. I've spent my life believing that and will continue to do so.'
It remains to be seen if the star's apology will be deemed acceptable by fans, such as one Twitter follower who called him out for not respecting the woman's privacy, noting: 'You made sure to get her permission before posting, right? And that she's not a minor? Way to keep it classy.'
However, they were not the only ones to hit at the performer's reputation, with another Twitter user commenting: 'yep. let's humiliate a stranger. Stay Classy, Buble.'
Despite the vitriol, Michael has continued sharing emphatic shots from his vacation, later posting a photo from his visit to Facebook and Instagram headquarters.
'Guess where I just visited ??? Nope not Disney...but my second favourite place in the world !! #facebook #instagram #headquarters #Miami #like #picoftheday' he wrote, along with an enthusiastic photo.
- Daily Mail