VIDEO : Madonna Rocks NYC Park For Hillary Clinton

A fierce and loyal Hillary Clinton supporter, Madonna surprised New Yorkers with an impromptu concert at Washington Square park last night. Hundreds flocked to Greenwich Village to see her. She was accompanied by her son David and a small acoustic band. She performed five songs: "Express Yourself," "Like a Prayer," "Rebel Heart," along with covers of John Lennon's "Imagine," and Pete Seeger's "If I Had a Hammer.