How do you handle it when the compliments start rolling in?

I am pretty laid-back... a "granola", "crunchy" type of girl and i have been overweight to downright obese most of my adult life. I am not used to getting complements on my looks and definitely not at the frequency in which i've been getting them lately. I am still a good 20 pounds from my goal weight and can easily point out all my flaws (BELLY!) but i can also appreciate that i have made great strides, acheived a lot and am doing things i never even dreamed were possible for me, so i guess it boils down to this: how do i respond? I try humility and modesty but when the complements are posted in a public forum, like Facebook, i worry that others will think "geez enough with her big head already!" ... I am getting uncomfortable with the attention and any words of advice on how to get thru it would be appreciated! THANK YOU!