Baby, baby, baby, no.

Justin Bieber sparked concern with new summer snaps featuring his baby boy, Jack Blues, via Instagram Thursday.

The pop star, 31, carried his son on his shoulders in one snap and sat on a couch while playing with the 9-month-old’s socked feet elsewhere in the slideshow.

Eagle-eyed fans pointed out that the singer was shirtless and wearing only blue shorts in the latter snap — the outfit he wore while smoking a blunt with a pal on the same couch in the previous pic.

The carousel, which proclaimed it’s “gonna be a good summer,” included another smoking shot.

“Walk me through your photo selection process,” one of the Grammy winner’s followers commented on the upload.

Another quipped that the post resembled “a teen dad promo from MTV.”

Many blasted the “Peaches” singer outright for “smok[ing] in front of [his] kid” and “doing drugs with the baby around,” encouraging him to “be better” — and encouraging his wife, Hailey Bieber, to stop the “unsafe” behavior.

One wrote, “I hope that baby wasn’t exposed to marijuana smoke… 😬.”

Some of Justin’s fans defended him in the comments, pointing out that the performer “isn’t even smoking with Jack in those photos he’s smoking in.”

However, one user noted, “bestie you should not bring a baby near a place with even just residues of smoke.”

Another added, “Even smoke that lingers on clothes or furniture (known as thirdhand smoke) can be harmful. So… maybe consider that. You’re a parent now. Act like one.”

Justin’s rep did not immediately respond to Page Six’s request for comment.

He and Hailey, 28, welcomed their baby boy in August 2024 and have kept him out of the public eye for the most part.

“He’s my priority. He is the most important thing to me,” the Rhode founder, who sold her company to e.l.f. Beauty this week for $1 billion, gushed in her Vogue cover story earlier this month.

“There’s an ease that comes with [motherhood], a confidence,” she added. “You really start to give less of a f–k about so many things. You’re just like, I don’t have the time, actually. I don’t have the energy.”

In the interview, Hailey also hit back at rampant rumors she and Justin are heading for divorce after tying the knot in 2018.

“You would think after having a child, people would maybe move on, chill out a little bit, but no,” the makeup mogul said. “So I guess these bitches are going to be mad.”