Obama celebrates 50th birthday in Chicago

<div class="meta image-caption"><div class="origin-logo origin-image "><span></span></div><span class="caption-text">President Barack Obama is welcomed by singer Jennifer Hudson, and Chicago Mayor, Rahm Emanuel at a fundraiser on the eve of his 50th birthday, Wednesday, Aug. 3, 2011, in Chicago. &#40;AP Photo&#47;M. Spencer Green&#41; (AP Photo&#47; M. Spencer Green)</span></div>
August 4, 2011 8:23:11 AM PDT