On the heels of a whirlwind 2009, Lady Gaga was forced to cancel a concert after she passed out. The singer collapsed in Indiana on Thursday one hour before going on stage, and later said on Twitter that she was suffering from exhaustion and dehydration.
"I've been crying for hours, I feel like I let my fans down 2nite," she wrote late on Thursday. "An hour before the show, I
was feeling dizzy and having trouble breathing. Paramedics came to take care of me, and told me my heart-rate was irregular
-- a result of exhaustion and dehydration."