Katy Perry Denies Feud With Britney Spears

Last week, when Katy Perry answered a question tweeted by her California Dreams tourmate Marina and the Diamonds about product placement in music videos, she never expected to touch off a media firestorm. And she's plenty mad that she did. It all started with Perry's reply to Marina's query for "a consensus on product placement in videos." Perry wrote on Twitter, "Do it with style and grace ...