Justin Bieber was booted out of a historic monument site in Mexico on Thursday (07Jan16) amid reports he had pulled down his underpants.

The Baby singer, who claimed he had cleaned up his bad boy act last year (15), reportedly attempted to enter the site of an ancient Mayan fortress in the Mexican town of Tulum while holding a beer.

He ditched the alcoholic beverage so he could be admitted, but he was later thrown out by staff for allegedly standing on a restricted monument and pulling down his underwear to expose his butt.

A report published in Spanish newspaper La Razon suggests police were called to intervene over complaints Justin was also insulting towards staff.

The pop star is reportedly on vacation with his family and rumoured girlfriend Hailey Baldwin.