Meryl Streep took opera singing lessons as a child , and as an adult , she previously sang in several films , including '' Postcards from the Edge '' , '' Silkwood '' , '' Death Becomes Her '' , and '' A Prairie Home Companion '' . She was a fan of the stage show '' Mamma Mia ! '' after seeing it on Broadway in September 2001 , when she found the show to be an affirmation of life in the midst of the destruction of 9/11
9/11
September 11 attacks
Mamma Mia! (film)