Justin Bieber Celebrates St. Paddy's Day With Green Hangover Juice!!!

3/17/2017 6:59 AM PDT

Justin Bieber is a regular Pied Piper with a massive headache!

The Biebs was in Mosman -- a suburb of Sydney, Australia -- Friday, when a gaggle of fans followed his every step.

Justin had tequila and apparently lots of it the night before, and he swears the green juice cures all that ails him.