Alicia Keys headed back to high school Tuesday to donate music instruments to students, delighting them with an impromptu singalong of her popular song "No One."
The Grammy-winning singer visited the Professional Performing Arts School in Manhattan to donate the instruments.
Keys says her alma mater is underfunded and oversubscribed, "and I hope to make this better for them."
She also launched an online contest where people can share how they would use $1,000 "to make the world a better place." It is part of the global campaign, "World of Betters."
The contest begins Tuesday and ends Dec. 15.
"World of Betters" also features rapper K'Naan, who will host an event in Johannesburg, and Indian singer Sunidhi Chauhan, who will host an event in Mumbai, India.