Our Jann Carl is in gorgeous Greece to go one-on-one with Meryl Streep to talk about all things 'Mamma Mia,' which hits theaters July 18. The Oscar winner reveals how her skills as a former cheerleader came in handy for one of her numbers and how she once dreamed of being a professional singer!

'Mamma Mia!' stars Meryl as an independent, single mother whose spirited daughter (played by "Big Love" star Amanda Seyfried) is getting married -- and is determined to learn the identity of her true father so he can walk her down the aisle. Pierce Brosnan, Colin Firth and Stellan Skarsgard are the three contenders, all of whom were involved with Meryl's character 20 years earlier when they visited her Greek island paradise. Inspired by the incredibly catchy music of ABBA and based on the hit musical that toured the world, 'Mamma Mia!' features such sing-along classics as "Dancing Queen," "Knowing Me, Knowing You," "SOS" and "The Winner Takes It All."