Justin was in such a good mood on Friday -- we love when he's like this! Our respectful photographer kept his distance and didn't bug Bieber and wife Hailey Baldwin as they stopped for frozen yogurt at Pinkberry.

Hailey was wearing the "Bieber" cap she got when the two were engaged in the Bahamas last year. She sported a sports bra/crop top with sweatpants and Vans high tops. Justin was in tight jeans with an oversized tee and denim jacket, accessorized with Yeezys and a beanie.

As Jailey returned to his Lamborghini, Justin made the last-minute decision to give some cash to a man who appeared to be homeless. He left his gull-wing door open and sprinted over to the man on the Melrose Ave. sidewalk, handed him what appeared to be a $100 dollar bill, and ran back to the car.

Check out the video -- when we asked the man what Justin gave him, he says, "A $500 bill!" Wow!