Happy World Humanitarian Day!

Beyonce's celebrating with her new music video for the track I Was Here, which is about making your mark by helping others.

Mrs. Jay-Z has enlisted Justin Bieber, Lady Gaga and Michelle Obama for the campaign, which asks that today, everyone helps someone else with acts such as volunteering at a homeless shelter or local charity. The goal is to share one billion messages of hope.

Beyonce's performance was taped last week at the United Nations in New York. The single is from her latest album 4.