Popsugar Celebrity Celebrity Birthdays Beyonce Performs at Michelle Obama's 50th Birthday Party Beyoncé Brings Down the White House at Michelle Obama's Birthday Bash January 20, 2014 by Nick Maslow View On One Page Photo 9 of 10 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 9 Source: Tumblr user beyonce Previous Next Start Slideshow Michelle ObamaJohn LegendBeyoncé KnowlesJay ZCelebrity BirthdaysBarack ObamaStevie Wonder