Does iMessaging to another country cost money?

I have an iPod Touch with iMessage and my friend in France has an iPhone… If I text her with my iMessage, does it cost ME or HER anything?

I live in the US, she lives in France. My iMessaging is free, I just don't want her to have to get charged fees for texting me (but to my iPod iMessage)

So, would either of us get charged anything?

It cost nothing. Hope this helps