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Pop star Justin Bieber was blasted on social media over an April Fools' Day joke that fell flat.

Bieber, 25, caused a shock among his fans on Monday when he posted a picture of an ultrasound on his Instagram page. He did not leave a caption on the mysterious post, causing many to speculate that his wife, Hailey Baldwin, 22, was pregnant with their first child.

“Very funny,” Baldwin commented on the post, People reported.

The “Love Yourself” singer posted another photo of Baldwin surrounded by what appeared to be medical professionals.

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“If U thought it was April fools,” he captioned the photo, implying that there was validity to his ultrasound post.

However, the singer finally clarified in another post that he was joking all along. Bieber posted a photo of another ultrasound photo but this time there was a puppy photoshopped in the image.

“Wait omg is that a,,,APRIL FOOLS,” he captioned the post.

The elaborate joke was criticized by social media users pointing out that jokes regarding pregnancy were insulting to those who have trouble conceiving or who have miscarried. The Centers for Disease Control and Prevention says 12.1 percent of women between the ages of 15 to 44 have impaired fecundity.

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“Justin Bieber lying about Hailey being pregnant is beyond disrespectful. 1 in 4 women suffer from infertility, miscarriages, still born babies. How f---ing disrespectful, Aprils fools or not, fake pregnancy announcements are f---ing disgusting. Are we still doing this in 2019?” a social media user wrote.

Justin Bieber joking about Hayley being pregnant is soooooo insensitive considering there’s so many women out there that cannot get pregnant or have lost children,” a social media user tweeted.

“OK Justin Bieber’s prank was NOT COOL. It is not ok to joke about pregnancy… and I seriously feel like I’ve been cheated on lmao,” a tweet read.

However, some social media users defended Bieber’s joke.

“Of course people are mad at Justin Bieber and his wife Hailey for pranking his fans with a pregnancy post for April Fools, it’s one of the top 5 jokes from this day, yall are so d--- sensitive for no reason smh,” a social media user tweeted.

“So wait lemme get this right…y’all can joke daily about Justin Bieber’s depression, mental health, anxiety, past issues, looks etc., but once he does an april fool about pregnancy y’all suddenly get all sensitive and woke? Nah I’m out of here y’all are literally TRASH bye,” a tweet read.

Bieber commented on Fox News' report on Tuesday, hoping it wasn't too late now to say sorry.

In a lengthy post, he apologized to his fans for the joke saying he did not "at all mean to be insensitive to people who can't have children."

"A lot of people I know, their first go to prank on April fools is telling their parents they are pregnant to get a big reaction," the "Sorry" singer wrote. "But I will apologize anyway and take responsibility and say sorry to people who were offended."

Bieber continued that "sometimes [you] just don't know what will hurt someone's feelings not to compare pregnancy with cake in the face but it's just to paint the picture of not knowing what will offend."