By Mirembe Martina
Beyonce has already released a music video in this regard titled, I Was Here, which was released on Sunday.
The artists are joining hands in celebrating the global campaign for World Humanitarian Day.
Obama and the pop stars have signed on to support the campaign.
The campaign asks that on Sunday, people help others through kind acts like making sandwiches for the homeless or volunteering at a local charity with the aim of sharing 1 billion messages of hope.
Other artists joining are Rihanna, Shakira, Jay-Z, Gwyneth Paltrow, Chris Martin and among others.