Bieber, Gaga, Obama join Beyoncé
New York - Justin Bieber, Lady Gaga and Michelle Obama are giving a helping hand to Beyoncé.
Obama and the pop stars have signed on to support Beyoncé 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 one billion messages of hope.
A representative for Beyoncé says that Bieber, Gaga, Obama, Rihanna, Shakira, Jay-Z, Gwyneth Paltrow, Chris Martin and others will participate.
Beyoncé once 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 on Sunday. The song is from her latest album "4."