The smiley singer brings a pop of color to a dark London night. Plus: Reese Witherspoon, Benedict Cumberbatch & more!

PRESIDENTIAL WEDDING GUESTS

President Obama, First Lady Michelle Obama and their daughters Sasha (top) and Malia arrive in White Plains, New York, for the wedding of White House chef Sam Kass on Saturday. And it was an evening to remember: The family partied the night away, and according to the White House press pool report, they returned home at 2:52 a.m., two hours and 37 minutes behind schedule.