Clarkson is “very hard to be in business with,” a source said after she canceled a Las Vegas show this weekend less than two hours before showtime.

Kelly Clarkson's decision to postpone the long-awaited opening of her Las Vegas residency was not an easy one. A source tells PEOPLE that the Grammy-winning singer, 43, “didn’t want to cancel any ...

Kelly is fighting some serious hidden battles that very few people are privy to.” a source in the know said of Kelly Clarkson ...