Star Gazing 8.28.13

President Barack Obama, First Lady Michelle Obama, and former Presidents Bill Clinton and Jimmy Carter arrive for the 50th Anniversary of the March on Washington at the Lincoln Memorial in Washington, D.C.

Oprah Winfrey speaks during the Let Freedom Ring Commemoration and Call to Action to commemorate the 50th anniversary of the March on Washington for Jobs and Freedom at the Lincoln Memorial in Washington, D.C.

Cuba Gooding Jr and Vanessa Williams attend Cuba Gooding Jr's Portrait Unveiling at Tony's di Napoli in New York City.

Rihanna is seen getting into a taxi in SoHo, New York City.

Solange Knowles performs at the 10th annual FYF music festival at Los Angeles Historical Park in Los Angeles, California.

First Lady Michelle Obama leaves after speaking at a screening of 'The Powerbroker: Whitney Young's Fight for Civil Rights,' at th Eisenhower Executive Office Building in Washington, DC. The screening is a part of celebrations commemorating the 50th anniversary on the March on Washington.

Melanie Brown visits The Pool After Dark at Harrah's Resort on Saturday in Atlantic City, New Jersey.

Angela Simmons at the 106 & Park Studios in New York City.

Nick Cannon at Radio City Music Hall for the America's Got Talent 820th Episode taping in New York City.

Kevin Hart sighted at BBC Radio Studios in London, England.

Gayle King attends SCENE Magazine and GREY GOOSE Vodka host special performance by John Legend at The Box in New York City.