Beyonce's Music Video 'I Was Here' to Debut Sunday

Beyoncé is doing her part to recognize humanitarian efforts around the world with the release of a special music video of her song I Was Here.

The R&B superstar sat down with Anderson Cooper to discuss her recent performance at the United Nations General Assembly Hall, where she recorded the song -- from her 2011 album 4 -- for a music video to be released on World Humanitarian Day, which is this Sunday August 19.

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Beyoncé told Anderson last night on his CNN show Anderson Cooper 360 that the song is perfect to coincide with World Humanitarian Day. "It says, 'I want to leave my footprints in the sands of time' and it basically is all of our dreams, I think. And that's leaving our mark on the world. I feel like we all want to know that our life meant something."

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The singer and new mother of baby daughter Blue Ivy Carter is no stranger to charity work and says she was thrilled and honored to be part of the U.N. effort. "We all have our purpose, and we all have our strengths... and it feels so wonderful to do something for someone else. And I think for the U.N. to want to include the whole world was something important, and I feel like that’s what I represent."

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Beyoncé is also featured on the U.N.'s website for World Humanitarian Day, where people are urged to go to learn practical ideas on how to make a humanitarian difference in their daily lives.