One of music's biggest superstars is headed to England this September, when Lady Gaga takes her global tour 'The Mayhem Ball' to the O2 in London. Fresh off her newest hit single "Abracadabra," Gaga ...

Barack Obama at a public appearance for a campaign rally in Philadelphia, PA, October 11, 2008. Photo by: Kristin Callahan/Everett Collection *Former U.S. President Barack Obama is set to command a ...