The star-studded Nashville Rising benefit show was organised by Bullock’s The Blind Side co-star Tim McGraw and his wife Faith Hill to help those affected by the recent flooding in the city.
The line-up featured big-name stars including Miley Cyrus, Taylor Swift, LeAnn Rimes and Carrie Underwood, but fans were stunned when Hollywood actress Bullock stepped on to the stage, according to People.com.
Armed with an acoustic guitar, Bullock told the crowd, “I’m going to bring the house down. And I’m going to do it Nashville style!”
She then picked out the first few notes of Deep Purple’s Smoke on The Water, before giving up with the admission, “I can’t play for c**p!”
The concert also featured a brief appearance from another Hollywood star – Reese Witherspoon, who hails from New Orleans, Louisiana, taped a video message which was played at the show, in which she told the audience, “(In Nashville) we get together and take care of each other.”
The event raised an estimated $3 million (£2 million) to help flood victims rebuild their communities.