Dennis Quaid says he used cocaine to practice piano 12 hours a day for one of his most iconic roles

Source: Business Insider

Dennis Quaid in "Great Balls of Fire!"Orion PicturesDennis Quaid revealed he used cocaine to prepare for his role in "Great Balls of Fire!"Quaid spent 12 hours a day learning piano to portray Jerry Lee Lewis in the 1989 biopic. Quaid has been open about his past cocaine addiction, which he overcame after rehab in 1990. Dennis Quaid admits he took things a bit over the edge while preparing to play rock 'n' roll bad boy Jerry Lee Lewis in his 1989 biopic "Great Balls of Fire!"Already a bonafide movie star thanks to his roles in films like "The Right Stuff," "The Big Easy," and "D.