Why is mamma mia so successful?

"Mamma Mia!" has achieved remarkable success due to its catchy ABBA soundtrack, which appeals to a wide audience and evokes nostalgia. The story's themes of love, friendship, and family resonate universally, while its vibrant, feel-good atmosphere makes it a popular choice for audiences seeking escapism. Additionally, its successful adaptations on stage and screen, featuring charismatic performances, have further cemented its cultural impact and enduring popularity.