(KUTV) As many as 40,000 people are expected to celebrate President Obamas second term at two official inaugural balls Monday night however, the celebrating was well underway before the President took his oath.

On Sunday night, party goers ate hors doeuvres and danced at unofficial inaugural balls in Washington D.C. but the two official inaugural balls are invitation only. Katy Perry, Jennifer Hudson and Alicia Keys will all be performing.

Staff Sgt. Bria Nelson, and Afghanistan veteran, will have the opportunity to dance with the President at the Commander in Chiefs ball.

It feels great, Im very excited, said Nelson, its truly and honor.

The First Lady will also hit the dance floor in a gown the world is anxious to see. Four years ago, she wore a white Jason Wu dress but this years fashion experts predict shell pick something more colorful.

The first lady will also hit the dance floor, in a dress everyone is anxious to see. Four years ago, she wore a white Jason Wu gown- but this year fashion experts predict she'll pick something more colorful.

Shes worn purple, which is a very regal color, and she looks good, said Hazel Clark, Research Chair of Fashion for Parsons New School for Design, but I wonder if shed wear something slightly lighter toned.

However, the ball isnt just about the fashion the food has also garnered plenty of chatter.

At the Green Ball at the Newseum, the Chef says he took inspiration from the First Lady and focused on local produce.

Chef Thomas Blundell says hes trying to keep it light and exciting, but healthy.

But Baltimores Charm City Cakes isnt counting calories as they create a nine-tier cake for one of the balls which features layers of red velvet, lemon poppy, pumpkin chocolate chip and what baker Mary Alic Yeskey calls a nod to the President a layer of pineapple coconut.

And even though its the Presidents second term, the parties promise to be first rate.

Ten years ago, there were ten official inaugural balls however this year there are only two. The White House says the celebration was scaled back because the nation is still recovering from tough economic times.

(Copyright 2013 Sinclair Broadcasting Group.) Washington DC Celebrates Inauguration With Ball