Justin Bieber and Lindsay Lohan clash, insist they are very different

FOX411's story on Justin Bieber descending into Lindsay Lohan-like behavior apparently struck a chord with both Bieber and Lohan.

Yesterday, experts told us that Bieber's latest "zonked out and strange" behavior reminded them of another young Hollywood troublemaker.

"When a star has to leave the stage after passing out, and ends up in hospital it is a clear indication that something is wrong. His recent 'health scare' is reminiscent of a young Lindsay Lohan who was constantly plagued by bouts of alleged 'exhaustion' early on," New York-based publicist Elissa Buchter said.

But Bieber apparently wasn't too happy to be compared to LiLo. On Thursday, he ranted on Instagram about his rocky relationship with the press, taking a jab at Lohan.

In the sentence, now deleted from the post, Bieber wrote "to those comparing me to Lindsey [sic] Lohan look at her 2012 tax statements."

Bieber boasted in the rant that he has had five number one albums-- all before turning 20.

And now his words have left Lohan wondering what she ever did to deserve the bashing from the pop star.

Sources told TMZ the "Liz & Dick" actress thinks his words were "senseless and mean."

And Bieber said he realized he went too far with his Lindsay quip.

"My post was only up for a few minutes but I realized right away that what I said at the end was wrong and distracted from what I was trying to say," he told TMZ. "I immediately deleted it and rewrote it so it would show what I was really feeling and those words are up now."

Like Lohan, Bieber has been getting press attention lately for all the wrong reasons. 

"Justin Bieber's toxic behavior is the result of too much too soon. Although he is in a very adult world, he has been granted unlimited access to anything he wants..." Buchter said.

Los Angeles-based medical professional Dr. Damon Raskin called Bieber’s latest escapades nothing short of "bizarre."

"The passing out on-stage could be related to a lack of sleep, poor nutrition or dehydration," he observed. "And it could be a sign that he is getting burned out."

And while industry expert and founder of Betafish Music, Jed Smith, acknowledged that the fainting is an obvious warning signal that "something is amiss," he described Bieber's behavior as quite simply, "unremarkably brattish."

"Now would be a great time for a moment of humility," Smith suggested. "Bieber could apologize to the fans he's blown off, allow some public insight into the pressures of world-class concert touring and being newly young and wealthy. If he doesn't turn perception of himself around eventually, he will be freak-showing his way on to a spot on ‘The Surreal Life.’"

FOX 411's Hollie McKay contributed to this report.