Warren Alvarez and his daughter Delilah, 5, of Queens, enjoy Father''s Day by playing one of the 88 Sing for Hope Pianos Photo

From: Photo Flash: Cast of ONCE and More at NYC's Sing for Hope Pianos

Sing for Hope Pianos returned to the vibrant New York City streets beginning June 1. For two weeks, 88 pianos were available for everyone to enjoy in public spaces throughout New York City's five boroughs in support of the NYC-based non-profit Sing for Hope and its mission to provide 'access to the arts for all.' The cast of ONCE and more joined in the festivites. Scroll down for photos!