Bieber, Gaga, Obama join Beyonce for campaign

FILE - This May 7, 2012 file photo shows Beyonce Knowles at the Metropolitan Museum of Art Costume Institute gala benefit, celebrating Elsa Schiaparelli and Miuccia Prada in New York. Beyonce is teaming with the United Nations and humanitarian aid organizations on a global campaign to encourage people around the world to get involved. The international pop star and songwriter Diane Warren will donate a video of "I Was Here" that will be filmed in the UN General Assembly Hall in New York in front of a live audience. The video will premiere Aug. 19 on World Humanitarian Day and the UN hopes it will help the campaign reach 1 billion people. (AP Photo/Evan Agostini, file)
August 18, 2012 4:46:47 PM PDT
Justin Bieber, Lady Gaga and Michelle Obama are giving a helping hand to Beyonce.

Obama and the pop stars have signed on to support Beyonce and the global campaign for World Humanitarian Day, which is Sunday.

The campaign asks that on Sunday people help others through such acts as making sandwiches for the homeless or volunteering at a local charity. The goal is to share 1 billion messages of hope.

A representative for Beyonce says that Bieber, Gaga, Obama, Rihanna, Shakira, Jay-Z, Gwyneth Paltrow, Chris Martin and others will participate.

Beyonce performed her song "I Was Here" at the United Nations in New York last week to promote World Humanitarian Day. The performance was taped and the music video will debut Sunday. The song is from her latest album "4."


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