'The Voice': Gwen Stefani accuses singer of lip syncing to Celine Dion - USA TODAY

The top 8 contestants on "The Voice" left it all on the stage, earning wild praise from coaches John Legend, Camila Cabello, Blake Shelton and Gwen Stefani.

But in the case of Omar Jose Cardona from Team Legend, sometimes singing can be so good it prompts playful roasting instead of compliments.

Legend said Cardona can do anything: "I feel like as a coach I just try to dream up what challenge I can issue to Omar, because Omar can do it.".

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