Justin Bieber Instagram Rant: I'm No Lindsay Lohan!

Note to Scooter Braun: you might wanna keep all umbrellas and razors away from Justin Bieber.

The singer has gone off on yet another social media rant, following his bashing of the press via Twitter last week with a rambling diatribe on Instagram.

This one also calls out the media... those who believe Bieber needs rehab... and even Lindsay Lohan's tax statements!

"I'm tired of all the countless lies in the press right now," Justin wrote. "Saying I'm going to rehab and how my family is disappointed in me."

Bieber, of course, has enjoyed a rough couple weeks abroad while on tour this month.

He collapsed on stage in London. He flipped the eff out at a cameraman. He canceled a show in Portugal. But he insists - in an angry, bitter tone - that he's doing just fine.

"My family is beyond proud," Bieber continued. "if Anyone believes i need rehab thats their own stupidity lol I'm 19 with 5 number one albums, 19 and I've seen the whole world. 19 and I've accomplished more than I could've ever dreamed of."

(THG Note: We mostly hear you, JB. But success doesn't exactly translate into mental well-being. It can often be quite the opposite, in fact. Just ask Dave Chappelle.)

Justin, not lacking for self-confidence, was far from finished:

"i'm 19 and it must be scary to some people to think that this is just the beginning. I know my talent level and i know i got my head on straight. i know who i am... My albums could be about anything but my messages have been to never say never and believe, not to believe in me, but to believe in yourself .. I honestly don't care if you don't believe in me because I believe in me, and look where that's gotten me so far...

"I'm writing this with a smile on my face and love in my heart. Letting u know first hand how I feel rather than have these story linger. I'm a good person with a big heart. And don't think I deserve all of this negative press."

Bieber concluded by saying he's "doing pretty damn good" and to all those "comparing me to Lindsay Lohan," Justin has a message:

"look at her 2012 tax statements."

In other words: Bieber has no problems because he is a lot richer than Lohan. Again, not really sure if that mindset is a sign of Justin having his head screwed on straight... or the total opposite.

What do YOU think? Should Bieber enter rehab?