However, the How I Met Your Mother star took to her Twitter Sunday to clarify...
The actress tweeted: "NO, I'm not pregnant! I just ate too much carnival food, that time of the month, hurt my back & couldn't suck my gut in, & need 2 do cardio!"
The she quipped: "And I'm NEVER gonna wear that shirt again!!!"
Read more: http://www.eonline.com/news/alyson_hannigan_no_im_not_pregnant/261886#ixzz1XBJbHHAg