Update: Watch Beyoncé perform the National Anthem below.

President Barack Obama is drawing an A-list of performers for his inaugural festivities, including a massive gala expected to draw more than 35,000 revelers.

Grammy-nominated pop-rock trio fun. will join Katy Perry, Smokey Robinson, Usher, Alicia Keys and Brad Paisley among other stars planning to sing at Obama's inaugural galas Jan. 21 and a children's concert on Jan. 19. Also signed up are Marc Anthony, Stevie Wonder, John Legend and the cast of Glee.

The concert and the two official inaugural balls are being held at the Washington Convention Center over the Martin Luther King holiday weekend when Obama begins his second term. The performers join top talent already announced for Obama's signing ceremony Jan. 21 on the West Front of the Capitol, including Beyoncé (who will singing the national anthem), Kelly Clarkson and James Taylor.

Inaugural organizers aren't saying yet which performances will be at which convention center event.