Obama sings "Lift Every Voice and Sing" at White House concert

Tuesday's "Celebration of Music From the Civil Rights Movement" at the White House went on despite the weather -- with only a couple of schedule changes. Bob Dylan, Joan Baez, Smokey Robinson, Natalie Cole, Yolanda Adams and Jennifer Hudson all performed; John Legend and John Mellencamp couldn't make it. At the end, President Obama joined all the performers save Dylan for "Lift Every Voice and Sing." He ceded the spotlight, saying, "Singers in the front here."

Here's audio of Dylan singing "The Times They Are A-Changin."

And the White House uploaded video of a pre-concert workshop:

Read full coverage of the event here.