Exclusive: Kendra Kassebaum and Paolo Montalban Perform SOS from MAMMA MIA!

The 5th Avenue Theatre's new production of Mamma Mia! - the hit musical that features the songs of the beloved pop group ABBA opens tonight. The 5th is the first theater company in the Pacific Northwest to be granted the rights to create a brand new original version of the famed production that has wowed audiences for nearly 20 years.