Even though it’s become widely known as a successful film franchise, the stage rendition of MAMMA MIA! remains an absolute musical powerhouse. The essential hits of chart-topping Swedish group ABBA serve as the soundtrack to a daughter’s journey to find the father she’s never known, which prompts the arrival of three men from her mother’s past. Set on a sun-strewn Greek island, the joyous production will be a summer highlight at the Kennedy Center.