UNIVERSAL PICTURES CELEBRATES MOMS EVERYWHERE WITH FREE MOTHER’S DAY SING-ALONG SCREENINGS OF Offer Valid in 25 Theaters Across North America on Sunday, May 13 Markets that will host the special Mamma Mia! Sing-Along screenings on May 13 include Atlanta, GA; Boston, MA; Chicago, IL; Dallas, TX; Denver, CO; Detroit, MI; Houston, TX; Los Angeles, CA; Miami, FL; Minneapolis, MN; New York, NY; Orlando, FL; Philadelphia, PA; Phoenix, AZ; Sacramento, CA; Salt Lake City, UT; San Diego, CA; San Francisco, CA; Seattle, WA; Tampa, FL; Toronto, ON; Vancouver, BC; Washington, D.C.; and West Palm Beach, FL . For more information and a list of theaters offering the special screenings, please visit www.MammasDaySingAlong.com. Guests of 10:00 A.M. Screenings of the Beloved Musical Comedy Will Be Among the First to Experience Exclusive New Footage from Mamma Mia! Here We Go Again. In anticipation of its upcoming Mamma Mia! Here We Go Again, Universal Pictures today announced that free sing-al...