US President Barack Obama and his wife Michelle arrive at the Commander in Chief's Ball at the National Building Museum in Washington January 20 2009 . AFP PHOTO / TIMOTHY A. CLARY (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images)

LONDON, ENGLAND - MAY 25: U.S. President Barack Obama and First Lady Michelle Obama arrive at Winfield House, the residence of the Ambassador of the United States of America, in Regent's Park, on May 25, 2011 in London, England. The 44th President of the United States, Barack Obama, and First Lady Michelle are in the UK for a two day State Visit at the invitation of HM Queen Elizabeth II. Last night they attended a state banquet at Buckingham Palace and today's events include talks at Downing Street and the President will address both houses of Parliament at Westminster Hall. (Photo by Yui Mok - WPA Pool/Getty Images)

WASHINGTON - JANUARY 20: President Barack Obama and first lady Michelle Obama walk in the Inaugural Parade on January 20, 2009 in Washington, DC. Obama was sworn in as the 44th President of the United States, becoming the first African-American to be elected President of the US. (Photo by Ron Sachs-Pool/Getty Images)

MIAMI, FL- OCTOBER 21: Democratic presidential nominee Barack Obama stands with his wife Michelle Obama during a campaign rally October 21, 2008 in Miami, Florida. Obama has said he will suspend his campaign beginning October 23 through October 26 to visit his ailing grandmother in Hawaii. (Photo by Joe Raedle/Getty Images)

US President Barack Obama and First Lady Michelle Obama prepare to greet President-elect Donald Trump and his wife Melania to the White House in Washington, DC January 20, 2017. / AFP / JIM WATSON (Photo credit should read JIM WATSON/AFP/Getty Images)

US President Barack Obama and First Lady Michelle Obama depart during the Congressional Black Caucus Foundation's Phoenix Awards Dinner on September 17, 2016 in Washington, DC. / AFP / CHRIS KLEPONIS (Photo credit should read CHRIS KLEPONIS/AFP/Getty Images)

WASHINGTON - MAY 12: U.S. President Barack Obama and first lady Michelle Obama arrive for An Evening of Poetry, Music and the Spoken Word in the East Room of the White House May 12, 2009 in Washington, DC. (Photo by Ron Sachs-Pool via Getty Images)

US President Barack Obama and First Lady Michelle Obama make their way into the East Room for after dinner entertainment with US governors February 22, 2009 at the White House in Washington, DC. AFP PHOTO/Mandel NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)

US President Barack Obama gives a thumbs up about US First Lady Michelle Obama's dress as they await the arrival of Chinese President Xi Jinping at the White House for a State Diner September 25, 2015 in Washington,DC. AFP PHOTO/JIM WATSON (Photo credit should read JIM WATSON/AFP/Getty Images)

WASHINGTON D.C. - SEPTEMBER 27: U.S. President Barack Obama and First Lady Michelle Obama arrive on stage for the Congressional Black Caucus Foundation Annual Phoenix Awards dinner, September 27, 2014 in Washington, DC. The CBC's annual conference brings together activists, politicians and business leaders to discuss public policy impacting Black communities in America and abroad. (Photo by Olivier Douliery-Pool/Getty Images)

WASHINGTON, DC - JANUARY 19: U.S. President Barack Obama (R) and first lady Michelle Obama (L) welcome Chinese President Hu Jintao for a State dinner at the White House January 19, 2011 in Washington, DC. Obama and Hu met in the Oval Office earlier in the day. (Photo by Mark Wilson/Getty Images)

US President Barack Obama stands with First Lady Michelle Obama shortly before greeting Indian Prime Minister Manmohan Singh and his wife Gursharan Kaur at the North Portico of the White House November 24, 2009, as the Obamas host their first official State Dinner. AFP Photo/Nicholas Kamm (Photo credit should read NICHOLAS KAMM/AFP/Getty Images)

WASHINGTON, DC - JANUARY 21: First Lady Michelle Obama and President Barack Obama attend the Inaugural Ball on January 21, 2013 in Washington, United States. (Photo by Taylor Hill/WireImage)

LONDON - MAY 24: (L-R) Queen Elizabeth II, US President Barack Obama, Michelle Obama and Prince Philip, Duke of Edinburgh arrive for a state banquet at Buckingham Palace on May 24, 2011 in London, England. (Photo by Rota/Anwar Hussein/Getty Images) *

WASHINGTON, DC - MARCH 10: U.S. President Barack Obama (R) and first lady Michelle Obama (L) come out from the White House for the arrival of Canadian Prime Minister Justin Trudeau and his wife Sophie Grgoire Trudeau for a state dinner at the North Portico March 10, 2016 in Washington, DC. Prime Minister Trudeau is on an official visit to Washington. (Photo by Alex Wong/Getty Images)

WASHINGTON, DC - MAY 13: First Lady Michelle Obama touches U.S. President Barack Obama's chin as they wait for leaders to arrive for the Nordic state dinner on the North Portico at the White House, May 13, 2016, in Washington, DC. Leaders from Denmark, Norway, Finland, Sweden, and Iceland were invited to the White House for the U.S.-Nordic leaders summit. (Photo by Drew Angerer/Getty Images)