Katy Perry went on Twitter a few days ago to blast the "in your face" use of product placement in videos.  And since Britney Spears had just released the product placement-heavy video for "Hold It Against Me", it really seemed like Katy was bashing Brit.  But Katy says that no, it was the "tabloid media, a.k.a. FILTH" making it seem that way.  She went on a Twitter rant Wednesday night trying to clear things up.  There's been no response from Britney.