Mamma Mia! is a musical/romantic comedy film based on the songs of successful pop group ABBA, with additional music composed by ABBA member _____ _________.

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ABIDES, AJAR, ALLOTMENTS, AMBO, AMIDE, ARMADAS, BLAMES, BROOMS, BUDGET, CALK, CHAT, CLEW, COLLATE, DETOXIFYING, DHAL, DIALING, DIPPY, DUET, EJECTIONS, GAGES, GAINFUL, GIBS, GLAM, JEER, JOKY, KNEES, LAMENESS, LUCY, MANA, MEMORIAL, MONODIC, NASDAQ, NEURALGIC, OUTS, PITA, REVERENTIAL, SARI, TALA, TORR