Irina Shayk Shakes Things Up For Her Big 4-0! Check Out Her Hot Shots!

Irina Shayk has us shook with how many hot shots she's shared over the years ... and lucky for you, we've culled them together in one place. So dive into her best pics and test how Shayk-y your Irina knowledge is in honor of her 40th birthday!

The Russian model may be entering a new decade, but she looks like she's aging backwards, as these bikini shots show.

Just take a peek at this little strappy black two-piece she wore poolside while striking a seductive runway pose.

And she looked absolutely heavenly in this angelic white one-piece with her hair blowing in the wind.

For a closer look at Irina's hottest shots, be sure to check out our gallery above ... and click below for some IS trivia!