I've had numerous requests like this, fell for the first one, and have ignored the rest. I've discovered bloggers send them out like spam. And the response I've gotten is negligible. It's too bad because the idea is great---women helping women build their businesses---but something's gone off course, and now it's just a way for many of them to get free products, which few of us can afford to give.
What I HAVE done in place of this that's worked much better is to find a blogger whose site I really like ("Life to Her Years" on FB is done by a dad about fathering daughters) and offered a child's necklace as a giveaway in one of his contests. Someone else on Etsy offered a little girl's dress. He was great about citing my site, and I got 40+ new likes out of it on FB, plus some good shop views.
So I stick with people I know, who have a real FB presence, and a large following. I build a relationship with them (for example, I'll do another giveaway for Michael at some point) and feature them on my page, as well. It's reciprocal, and it works well.
If you're going to do a giveaway (and this is sometimes a great strategy), make sure it's to someone with integrity.