Justin Bieber‘s got nothing to hide … because he’s posting everything on social media — including a new pic with a bong in his lap.

Check out the gallery — just a day after the pop star went on a bizarre rant about God, people pleasing, fishing and more, he hopped back on Instagram to share a carousel of photos Wednesday night, the first of which shows him grinning from ear to ear with a bong placed front and center — and possibly a vape of some sort in his hand.

The pics appear to be taken from his studio in Iceland, where he’s been staying the last several weeks while he works on new music.

JB’s carousel includes several snaps of him creating some new tunes in between what appear to be smoke breaks.

For example, one pic shows him with a mic set up and what looks like a joint in his hand. Another photo has him soaking in Iceland’s beauty outside — with a cloud of smoke expanding around his head.

Justin’s apparent drug use comes as fans continue to question his well-being amid his gaunt appearance, confusing social media posts and recent outbursts at paparazzi.

TMZ covers these concerns and more in our new “TMZ Investigates: What Happened to Justin Bieber?” documentary, now available on Hulu.

We also dig into his financial troubles … which we learned were a driving factor behind the shocking 2022 sale of his entire music catalog for $200 million. TMZ further discovered Bieber owes his former manager, Scooter Braun, millions of dollars … which is just part of the reason behind their fallout.

Justin Bieber made somewhere between $500 million and $1 billion as the world’s biggest pop star, but he blew it all … and ended up being in such dire financial shape he had to sell his music catalog for $200 million.

TMZ has a new documentary, “TMZ Investigates: What Happened to Justin Bieber,” now available on Hulu, and part of our investigation digs into Justin’s money problems.

People on Justin’s side told us he was on the verge of “financial collapse” back in 2022 … so much so that he felt he had to sell the rights to his music that December.

We’re told Justin’s manager Scooter Braun tried to tell him it was a bad idea to sell so early in his career, and to at least wait until January 2023 to get a tax break … but Justin didn’t want to wait so he sold it in December.

Lots of artists have sold their catalogs, but Justin is by far the youngest to do it … and we’re told being broke had a lot to do with his decision.

Our Bieber documentary also explores Justin’s mental health, marriage, money troubles, his church and his career.