Hailey likes it, so she put a ring on it!

Mr. and Mrs. Bieber are ring-official according to our recent snaps of Justin. He's been sporting a simple band on his left ring finger as of late ... does that mean a wedding ceremony is in the near future? Or maybe it means they've decided to skip it and let their courthouse nuptials serve as their wedding?

So back to these pix we shot yesterday ... Justin was at Westfield Mall in Century City wearing quite the disguise. He had on an oversized Drew tie-dye sweatshirt with his baggy corduroy pants and Nike low-top Jordans with his favorite Deus beanie underneath the hood and funny white sunglasses that we suspect he borrowed from a friend. He jumped out of his chauffeured van with friends and headed into Del Frisco's Double Eagle steakhouse for a meat-and-potatoes lunch.

Of course Biebs has to be undercover if he goes to a teen-ridden mall, lest he get mobbed by rabid fans. We kinda think this outfit drew (pun intended) more attention that anything, though. Wouldn't you stare at this dude if you saw him at the mall?