Carrie Underwood, 40, looks incredibly muscular in one-leg, one

The country singer looked incredibly muscular with sculpted arms and very strong legs as she was glammed to the nines. She will be the open for the new season of Sunday Night Football.

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Carrie Underwood, 40, looks incredibly muscular in one-leg, one

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Carrie Underwood shows off toned legs in silver mini-dress at the