Just two days ahead of Facebook's public stock offering, the social networking site has been "de-friended" by a major advertiser.

General motors is pulling its ads from the social media giant, saying the ads don't generate sales.

The world's largest automaker reportedly spends around $40 million to market on Facebook.

Much of that goes to maintaining its brand pages, which will continue, but the ads that pop up along the side of the Facebook screen are going away.

Facebook announced today it will make 25% more shares available than was initially rumored.

If they get the $38 per share they are hoping for, the company would be valued at more than $104 billion.