Seen were artists like Luke Kenny of Rock On fame, model Nethra Raghuraman and actor Sachin with his wife besides actor Shekar Suman all dressed for the occasion. Mamma Mia! is a stage musical with a book by British playwright Catherine Johnson, based on the songs of ABBA, composed by Benny Andersson and Björn Ulvaeus. It is an example of a jukebox musical, and is notable for popularising the genre. The plot is adapted from the 1968 film Buona Sera, Mrs. Campbell starring Gina Lollobrigida.