Worst Films of Grammy Stars

Kelly Clarkson in “From Justin to Kelly”

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Some of today’s biggest pop stars have flatlined at the movies, including Rihanna, Kelly Clarkson, Mariah Carey and Britney Spears. Rock legends haven’t been immune to ill-fated crossovers, either, as bombs starring Bob Dylan, Elvis Presley, and Johnny Cash will attest. Here are some of the weird and not-so-wonderful fizzles that remind musicians not to quit their day jobs. -- By Chris Willman, Yahoo! Music

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