During the scene where Etta James is singing "I'd Rather Go Blind", she is seen with the microphone in her hand at the beginning of the second verse of the song. The camera then shows her from behind so Adrien Brody's character can be seen exiting the studio and the microphone can be seen clearly over her shoulder still on its stand. A second later the camera cuts to her face again and she is somehow still holding the microphone.
Chuck Berry is depicted as angrily pointing out the resemblance between the Beach Boys' "Surfin' U.S.A." and his own "Sweet Little Sixteen" at the time of his arrest for violating the Mann Act. Berry was in fact arrested on this charge in December 1959, and ultimately (after two trials and a failed appeal) sent to prison from February 1962 to October 1963. "Surfin' U.S.A." was released in March 1963, when Berry was still in prison.