In her new film Mamma Mia! Meryl Streep bursts into song -- again! Throughout her career the multi-talented actress hasn't been shy about showing off her impressive set of pipes. (And unlike many other stars, she's even resisted the urge to cut a vanity crossover album.) Take our five question quiz to see how well you recall Meryl's musical moments. As she (and ABBA) would say, "The Winner Takes It All."