Beyonce unveiled her new video for I Was Here on World Humanitarian Day yesterday, shining a spotlight on humanitarian work and encouraging people to get involved by doing something good for others.

The inspiring video, shot inside the General Assembly Hall of the United Nations, was 'donated' to campaign bosses in a bid to encourage one billion people around the world to get active in their communities.

"I Was Here says I want to leave my footprints in the sands of time, and that is leaving our mark on the world," Beyonce told Anderson Cooper in a behind-the-scenes interview. "We all want to know that our life meant something, and that we did something for someone else, and that we spread positivity no matter how big or how small."

A rep for the singer told the Associated Press that Jay-Z, Coldplay's Chris Martin, Michelle Obama, Bieber, Shakira and Gwyneth Paltrow had signed on to participate in World Humanitarian Day.

PHOTOS: Beyonce through the years...

Loading Slideshow

• 1998

  Kelly Rowland, Beyonce, LeToya Luckett and LaTavia Robertson at the Shine Auditorium in Los Angeles.

• 1998

  Beyonce rocked a camouflage dress at a live performance at HMV.

• 2000

  On stage at Party in the Park.

• 2000

  Destiny's Child hit the Grammy Awards in all white.

• 2000

  Destiny's Child wear matching yellow outfits.

• 2000

  Beyonce performed at the VH1 Vogue Fashion Awards.

• 2001

  Destiny's Child wear denim, crop tops and rhinestones.

• 2001

  The singer opted for sheer and sparkly at the Grammy Awards.

• 2002

  Doing her best Foxxy Cleopatra impression in a glittering gold dress.

• 2003

  Looking lovely in a full length floral dress at the VH1 Divas Duets.

• 2003

  She rocked the LBD for the Entertainment Industry Foundation Party.

• 2003

  Perhaps not her finest fashion moment. Beyonce at the NBC Today Show Summer concert series.

• 2003

  She dazzled the crowds at the 2003 MTV Video Music Awards.

• 2004

  She dressed down in UGGs to announce the pre-game activities for the Super Bowl.

• 2004

  Beyonce launching her Tommy Hilfiger fragrance.

• 2004

  Reunited with Michelle Williams and Kelly Rowland at the 2004 Jingle Bell Ball.

• 2005

  Beyonce got glammed up for the opening of Jay-Z's 40/40 Club in Atlantic City.

• 2006

  Beyonce backstage at the MTV's Total Request Live.

• 2006

  Who else could look this good in a nude mini dress? Another backstage pose after her appearance on MTV's TRL.

• 2006

  Beyonce rocked canary yellow at a chaity event.

• 2007

  Anothe glam look for the opening of Jay-Z's 40/40 Club, this time in Las Vegas.

• 2008

  One of the singers finest red carpet moments. She stepped out in an Armani gown at the Metropolitan Museum of Art Costume Institute Gala.

• 2009

  Beyonce topped the best dressed lists at the Golden Globe Awards in an Elie Daab gown teamed with a dazzling diamond necklace by Lorraine Schwartz.

• 2010

  Beyonce looked white hot at the launch of the Lorraine Schwartz's 2BHAPPY jewellery collection.

• 2011

  The singer announced her pregnancy at the 2011 MTV video Music Awards. She looked stunning in this asymmetrical Lanvin gown.

• 2011

  Beyonce at the launch of her Pulse fragrance.

• 2011

  Beyonce at the Pulse fragrance launch.

• 2011

  Pregnant Beyonce wore a black maxi when hosting the screening of Live at Roseland.

• 2012

  Beyonce attends the Costume Institute Benefit at The Metropolitan Museum of Art.