Today in Tweetbeat: Sarah Palin "learns" "humility" by stumbling on a stage, Katy Perry initiates the Great Katy Perry/Real Housewives Summit of 2009, John Mayer has a high-tech (and illogical) cheating trick, and Soulja Boy says what now?

Katy Perry Invites Herself To Real Housewives Dinner; John Mayer Teaches Phone Cheating 101

Katy Perry Invites Herself To Real Housewives Dinner; John Mayer Teaches Phone Cheating 101

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Katy Perry Invites Herself To Real Housewives Dinner; John Mayer Teaches Phone Cheating 101

Katy Perry Invites Herself To Real Housewives Dinner; John Mayer Teaches Phone Cheating 101

Katy Perry Invites Herself To Real Housewives Dinner; John Mayer Teaches Phone Cheating 101

Katy Perry Invites Herself To Real Housewives Dinner; John Mayer Teaches Phone Cheating 101

Katy Perry Invites Herself To Real Housewives Dinner; John Mayer Teaches Phone Cheating 101

Katy Perry Invites Herself To Real Housewives Dinner; John Mayer Teaches Phone Cheating 101

Katy Perry Invites Herself To Real Housewives Dinner; John Mayer Teaches Phone Cheating 101

Katy Perry Invites Herself To Real Housewives Dinner; John Mayer Teaches Phone Cheating 101