There's still time to join Beyonce in leaving a footprint on World Humanitarian Day, this Sunday.  Anyone can log on to the "I Was Here" campaign website , and pledge to complete at least one humanitarian act on August 19 to make a positive impact on the world.

Earlier this month, Beyonce announced that she'd teamed up with the United Nations and aid organizations to spotlight humanitarian work around the globe and bring awareness to the plight of people affected by crises worldwide. 

Last week, Bey was at the United Nations General Assembly Hall in New York City, where she performed her song "I Was Here" for a live audience.  Speaking to CNN's Anderson Cooper earlier this week Bey said, "We all want to know that our life meant something and that we did something for someone else and that we spread positivity, no matter how big or how small, so the song ["I Was Here"] is perfect for Humanitarian Day."

Footage from Bey's "I Was Here" performance at the U.N. has been turned into a music video that will be available for download on World Humanitarian Day.  Bey and her "I Was Here" co-writer Diane Warren donated the clip, and proceeds from sales of the single and matching visual will benefit humanitarian aid groups.

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