Taylor Swift's sour Grammy notes caused by a 'technical issue'

taylor-swift-stevie-nicks.jpgIf you noticed a few sour notes in the Taylor Swift/Stevie Nicks duet on the Grammy Awards, you are not alone.

Taylor and Stevie rehearsed their duet twice to good reviews. But on the show, there were definitely off-key moments. We weren't actually sure who sang those notes.

But Taylor Swift's record company exec -- Big Machine Records CEO Scott Borchetta admits it was her.