Justin Bieber in 'Where's Waldo?' Hat and Glasses

Justin Bieber's taking a page straight out of "Where's Waldo?" ... with his own take on the elusive character, but he still stands out a helluva lot more than Waldo.

Paps got Bieber in Barcelona Monday making a pit stop at a gas station and swooping up some munchies for the road. His outfit was ... inspired?

#ThereHeIs!