Today on Twitter, Rihanna tweeted a picture of an absolutely hysterical fake ticket to her sold out concert in Barbados! We give the counterfeiter an A+ for effort and an F for artistic ability! Lupe Fiasco told his followers that he was quitting Twitter and Chris Brown lashed out at the media, once again. Big Sean tweeted apologies to his fans, and the congratulatory messages aimed at Demi Lovato keep coming, this time from Katy Perry! We keep our eyes on the sky and our ears to the ground in the Twitter-verse!