It's Queen Elizabeth's 90th birthday on Thursday (aren't you bummed she missed out on having a 4/20 birthday?), and to celebrate, Mashable made this puzzle that asks you to find the monarch within a crowd of corgis, her favorite dog. It's reminiscent of that panda puzzle that went viral last year, only newsier!

Can you find Queen Elizabeth in this sea of corgis? By @maxknobs

A post shared by Mashable Watercooler (@watercooler) on

On her birthday, the queen will become the only British monarch to reach 90. And she's still sharp enough that she can probably solve this puzzle.

Sources: Mashable