Kelly Clarkson has canceled six shows on her Piece by Piece tour. These were the final remaining dates on her United States leg of the tour.


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Clarkson took to Twitter and apologized to her fans for having to cancel. "This kills me, but doctors are saying I need to rest my voice! Please know that I never cancel anything unless it's absolutely necessary," wrote the "Since U Been Gone" singer.

There has been no word yet if these six dates would be rescheduled at a later date.

The next portion of the tour, the international leg, is set to kick off on Oct. 1 in Ontario, Canada. As of now, Clarkson is still set to continue the tour.

The Piece by Piece tour has been making headlines almost on a weekly basis as Clarkson picks a unique song to cover each show. Her covers ranged from Nick Jonas to Prince.