You called it, Jezebel. The "My butt is big" Nike ad the blogosphere has been buzzing about all week is actually a fake. AdAge.com, an advertising industry blog, checked with Nike and Nike's agency, who confirmed it's bootylicious, but it's not real! Instead, it's just a canny knock-off of Nike's actual 2005 "My butt is big" ad campaign. I guess I should have been suspicious that the fake ad spelled the word "embassador" with an "e" instead of the more common spelling with an "a.