Watch Fifth Harmony Sing Happy Birthday at the White House

Chip Somodevilla/Getty Images
Fifth Harmony performs the 'Happy Birthday' song from the Truman Balcony to mark the fifth anniversary of first lady Michelle Obama's Let's Move program during the White House Easter Egg Roll on the South Lawn of the White House April 6, 2015 in Washington, DC. 

Fifth Harmony sang a very important version of Happy Birthday at the White House this week.

This year's White House Easter Egg Roll doubled as a celebration for the fifth anniversary of Let's Move!, the First Lady's program to encourage people to exercise. As part of the fifth year celebration, President Obama invited Fifth Harmony to sing -- and boy did they seize their moment.

Check out the serious harmonies below.