Blake Lively's b-day was turned into an actual bee day.

Ryan Reynolds' wife is sharing her painful and scary encounter with bees during a recent photo shoot just before her 27th birthday, which she celebrated Monday. In a blog post on her new lifestyle site, Preserve, Lively revealed that she was left "shaken" and "swollen" after experiencing a vicious bee attack.

"Just yesterday, the final day of the shoot, I felt an electric shock of energy - was it excitement that I was about to turn another year older? Was it nerves? Why did it feel like agony?" she wrote. "I like getting older...I think. But this felt terrible. Does your butt quite suddenly (and painfully) deflate when you turn 27? Because mine hurt like hell...then my neck, back, legs and forehead. And oh my hands! They were shriveling. It felt like I was being shot by dozens of tiny invisible darts. I felt like the Wicked Witch, melting, melting, burning, melting."

The actress eventually realized that she "wasn't being greeted by the onset of spontaneous aging, but rather a full-fledged bee day - attacked." Lively said she begin running and whipping her arms around to shoo the bees.

"I don't know enough about insects to say if they were wasps, honeybees or Mother Nature's miniature flying tasers," Lively wrote. "What I DO know, is that just moments before we were in the midst of a gorgeous fall fashion shoot. Now, I was a Monty Python sketch; running at top speed in no particular direction, whipping my arms and hands around like I'd just discovered they were growing out of my shoulders without my previous knowledge."

Adding: "There was a terrible sound piercing the air too... I was later informed this sound had emanated from my very own mouth. I'd prefer to never hear it again. Along with everybody else on the East Coast. I was shaken. I was swollen. I had to stop what I was doing to recuperate and/or shrink."

To recover from her incident, the former "Gossip Girl" actress decorated a vanilla cake and threw herself a fake 27th birthday party. She posted pictures of an impressive table setting and party favors.

"It took a swarm of bees to remind me that a b-day is nothing but a number," she wrote. "Each day I choose my age. Today it's 27, going on 2."