Today on Twitter, Wiz Khalifa admitted that he's feeling a bit hungover today. Apparently, he threw a birthday bash for his soon-to-be 29-year-old fiancee Amber Rose, and things got a little out of hand. Let's just say that Wiz likely didn't know where he was when he woke up! Also in today's tweets, Chris Daughtry made an expensive mistake flying to Canada sans passport, Snoop Dogg goofed off with the Siri app on his new iPhone 4S and Pitbull thanked his fans for sticking around through everything. See what your favorite pop stars were tweeting about today!