Mamma Mia! may be one of the highest grossing musicals of all time, but Bjorn Ulvaes, one of the founding band members of Abba, thinks the proposal for a sequel is one he's willing to take a chance on. Ulvaes thinks the concept of continuing the story wouldn't work from a creative standpoint. Meanwhile, other key creative members of the first film are enthused about the prospect. For more
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