Born on this day in 1961 in Honolulu, Hawaii, President Barack Obama is celebrating his 54th birthday. In honor of his special day, Sotheby’s examined some of the best Obama-inspired art sold at Sotheby's, from Shepard Fairey’s iconic “HOPE” campaign poster, to an arresting black and white portrait by Mark Seliger. Click through the slideshow – and don’t forget to wish him a happy birthday!