Justin Bieber's NYC Post Concert Turn Up Was for the Dogs

Justin Bieber passed on poppin' bottles after his Madison Square Garden concert -- but still dropped some coin to rent out an entire theater for his crew to watch "The Secret Life of Pets."

Sources tell us JB locked down an entire cinema for himself and about 10 friends to get a private viewing of the #1 movie. It's unclear what size theater Justin secured at the AMC theater in Times Square Monday night -- but it would've cost him somewhere between $750 and $3,000.

And guess who made the cut -- Bieber's ex-gf Chantel Jeffries.

Soooo ... now we know who shared popcorn with Justin.