Last night, before a show in Indiana, Lady Gaga was feeling dizzy and having trouble breathing. The paramedics told her that she had an irregular heartbeat which was "a result of exhaustion and dehydration." So she canceled the show. She apologized to her fans on Twitter, "I've been crying for hours, I feel like I let my fans down 2nite." Normally, I'm very suspicious of the celebrity-exclusive disease known as "exhaustion" as it's vague and generally used as code for "did too many drugs" or "hasn't eaten in six years." But Gaga seems really bummed by the cancellation. "I have performed with the flu, a cold, strep throat: I would never cancel a show just based on discomfort," she twoted. "I hope you can forgive me. I love my little monsters [fans] more than anything." [MTV]

After Gaga's year, I can believe she's exhausted. As for the following celebrities, I'm not so sure.