Justin Bieber Falling Hard for Sofia Richie (TMZ TV)

We got Sofia Richie out at 1 AM Thursday leaving The Nice Guy ... sans Justin Bieber. But the night had just begun for her, and an hour later she reappeared -- with Bieber himself -- leaving Doheny Room. Subscribe! TMZ -- Subscribe to TMZ Live -- Subscribe! TMZ Sports -- Subscribe! toofab -- NEED MORE?