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!

From June 1 to June 16, the uniquely designed 88 Sing for Hope Pianos were located in public plazas and parks for all to enjoy. For many youth, playing one of the Sing for Hope Pianos was the first time they'd ever touched a piano or been exposed to a live musical performance. In celebration of the project, Sing for Hope hosted impromptu concerts performed by volunteer musicians, as well as other public events throughout the two-week event.

The pianos also served as a beautiful display of visual art. Each of the 88 pianos was individually designed by local artists, students, volunteers and notable supporters of the arts including chair, president, and editor-in-chief of The Huffington Post Media Group, Arianna Huffington and her sister Agapi Stassinopoulos, as well as fashion designer John Varvatos.

Sing for Hope mobilizes more than 1,000 volunteers who donate time and talent to service programs that benefit schools, hospitals and communities throughout the year. Following the two-week summer event, the 88 pianos will be donated to New York City schools, hospitals and other organizations, wherein Sing for Hope will conduct year-round arts programming to enrich local communities for years to come.

Locations of Sing for Hope Pianos were spread over the far reaches of New York City. A few included: Manhattan, Astor Place, Central Park, South Street Seaport; in Brooklyn, Brooklyn Navy Yard, Coney Island, Irving Square, Prospect Park; in the Bronx, Joyce Kilmer Park, Pelham Bay Park, St. Mary's Playground; in Staten Island, Clove Lake Park, Snug Harbor, Staten Island Ferry Terminal; and in Queens, Astoria Park, Flushing Town Hall, Jackson Heights.

The Sing for Hope vision of ART FOR ALL is informed by our belief that the arts have unique power to uplift and unite individuals and communities. Our outreach programs in NYC's under-resourced schools and healthcare facilities demonstrate this every day, and the Sing for Hope Pianos are a summertime celebration that bring this to every corner of our city. If you are one of the millions of New Yorkers who have played the outdoor pianos in Times Square, Brooklyn Bridge Park, and other parks and public spaces in the summertime, you know why Sing for Hope Pianos are NYC's most beloved public art project. Ongoing support for Sing for Hope is provided by Sing for Hope's Founders' Circle including The Arnhold Foundation in honor of Sissy Arnhold, The Anna-Maria & Stephen Kellen Family Foundation, and Ann Ziff. For more information, please visit singforhope.org.

Sing for Hope gratefully acknowledges Golden Artist Colors for their generous donation of paints for Sing for Hope Pianos. Sing for Hope Pianos is made possible through the generous support of Chobani, Inc., maker of America's No. 1 selling Greek Yogurt brand, and in collaboration with the City of New York.

Photo Credit: Diane Bondareff/Invision for Sing for Hope

88 Sing for Hope Pianos, supported by Chobani, Inc., come together for a day of free concerts to celebrate "Art for All" on the Josie Robertson Plaza at Lincoln Center in New York, Sunday, June 16, 2013.

Jay Williams and Lee Bullitt, of New York, play on the piano designed by Arianna Huffington and her sister Agapi Stassinopoulos, one of the 88 Sing for Hope Pianos, supported by Chobani, Inc., at the Josie Robertson Plaza at Lincoln Center, Sunday, June 16, 2013.

A girl plays one of the 88 Sing for Hope Pianos

Seth Johnson and his daughter Phoebe, enjoy Father's Day by playing one of the 88 Sing for Hope Pianos

Artist Jessica Browne-White plays the piano she designed, one of the 88 Sing for Hope Pianos

Sangwani, left, and Eghosa Mabhena share a moment at the piano designed by John Varvatos, one of the 88 Sing for Hope Pianos

88 Sing for Hope Pianos

Sing for Hope co-founders Monica Yunus, center right, and Camille Zamora, center left, celebrate the conclusion of the Sing for Hope Pianos project

Arthur Darvill and Joanna Christie, of ONCE, the Tony Award-winning musical, kick off a day of free concerts as part of the celebration of "Art for All" and the conclusion of the Sing for Hope Pianos project.

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