Justin Bieber & Sofia Richie Someone's Falling Hard for Her

8/25/2016 6:44 AM PDT

Justin Bieber's Falling Hard for Sofia Richie

Sofia Richie's easily amused ... at the expense of a couple of paps who were clearly head over heels for her.

We got Sofia out at 1 AM Thursday leaving The Nice Guy ... sans the Biebs. But the night had just begun for her, and an hour later she reappeared -- with Bieber himself -- leaving Doheny Room.

Hope she's not late for work today.