Yes, even the biggest stars in the world have to take a break.  According to AP, Taylor Swift had to cancel her concert at the KFC Yum! Center in Louisville Saturday night under doctor's orders. While the cause of Swift's illness is unknown, this marks the first time in her career she has had to cancel a show.  Swift took to Twitter to explain the circumstance.    It's just kind of "mean" it had to be a Kentucky date; but don't fret, Swift will make up the Louisville date on October 11th.  For now, Swift has been ordered to rest until Friday before she resumes her "Speak Now" tour.