The stars turn out for Beyonce...

Beyonce performs “I Was Here” in the United Nations General Assembly Hall. (AP)

Beyonce performed in front of hundreds, including Julia Stiles, R&B singer The-Dream and songwriter Diane Warren, who wrote “I Was Here.” (AP)

Beyonce recorded a performance of I Was Here at the UN General Assembly Hall for World Humanitarian Day in New York. (AP)

Beyonce performs “I Was Here” in the United Nations General Assembly Hall. (AP)

Beyonce performs in the United Nations General Assembly Hall. (AP)