Demi Lovato, Rihanna, Katy Perry, Ariana Grande, Christina Aguilera, Beyoncé, Charice, Kelly Clarkson, Whitney Houston, Mariah Carey.\r<br>\r<br>usually a vocal crack is called fail but today i show you good examples live (compilation)\r<br>Everything About Epic Moments Best or Fail\r<br>Sorry Taylor Swift is not here
