Joan Jett performs EPIC medley of her hit songs with Carrie Underwood at the CMA Fest

Legendary rocker Joan Jett gave fans the ultimate treat when she made a surprise appearance at the CMA Fest in Nashville this week.

Joining American Idol winner, Carrie Underwood, on stage, the pair belted out an incredible medley of Jett classics, including 'I Hate Myself for Loving You', 'Bad Reputation', 'I Love Rock 'n' Roll' and 'Crimson and Clover'.

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Jett was all swagger in front of the country concertgoers, bashing at her guitar and sharing a fierce "ow!" with the audience.