'Pitch Perfect,' 'Modern Family' and Other Stars Sing a Cappella for Hillary Clinton

Elizabeth Banks, Julie Bowen and other celebs belt out "Fight Song."

— -- Several members of the "Pitch Perfect" cast are "with her."

"Tonight ... you people have made history, and you're gonna make history again in November. Because Hillary Clinton will be our first woman president and she will be a great president, and she will be the first in a long line of women and men who serve with grit and grace," Streep said to applause. "She'll be the first but she won' be the last!"