Backstreet Boys Submit Video of Howie Dorough Taking Photographs For Cinco De Mayo

The Backstreet Boys are giving people ideas on how to spend Cinco de Mayo … showing fans how the guys celebrate — with a vid of Howie Dorough slamming shots.

The band’s official account posted the video Sunday morning … and, it follows HD’s drinking odyssey as he fires down tequila shot after tequila shot at Howie’s Guac and Shots.

And, man … Howie really knows how to hold his liquor — downing at least eight shots in the sweltering Mexico heat while apparently MCing one of the events.

Apparently, the event in the video took place a couple weeks ago at “Backstreet’s Back at the Beach” … a festival organized by the group in Cancún — but, as far as we can tell, this is the first time they’ve posted a vid counting off drinks. Seems they saved it for a special occasion.

The event celebrated 30 years of the Backstreet Boys and featured curated events for fans including a series of live performances … one rocking good time for sure.

BTW … the Backstreet Boys have a ton of time to celebrate Cinco de Mayo weekend ’cause they were slated to appear at the Lovers & Friends Festival in Las Vegas before it was canceled.