Beyoncé Knowles films I Was Here on stage at the United Nations.

Talk about making a fierce comeback! It's been seven months since Beyoncé gave birth to Blue Ivy Carter, and, other than a couple of shows in the US, she is yet to make an official

release. This is a still from the filming of her first video for over a year, a rendition of her 2011 song I Was Here, a which she performed on stage at the General Assembly Hall of the United Nations. The clip is set to debut on 19 August 2012, and aims to highlight humanitarian work and encourage other's involvement by doing good things for others in need. "We all see the headlines and we think, 'What can I really do to help?' World Humanitarian Day is an opportunity for all of us to work together to make a difference," she told a room full of stars during the performance.