Pin Up: Katy Perry headlined the Kids Inaugural concert on Saturday evening in Washington
Stars and Stripes: Katy wore an imaginative Uncle Sam style costume for her performance
Hot pants: Katy started her performance in a skirt before revealing her red and white hot pants on beneath
Salute: Katy had a particularly coordinated outfit which included a little hat and a red ribbon around her neck
Let’s dance: Katy performed a variety of her well-known songs including Firework
Montage: As she performed a video played of Obama with various military families
TV favourites: Glee’s Darren Criss and Naya Rivera showed off their vocal talents during the evening
Stylish: Naya Rivera wore a tweed dress, while Darren Criss wore appropriate red
Let’s dance: Usher gave his usual very energetic performance when he took to the stage
Pep talk: Usher spoke about the importance of youth activism, as well as the value of the sacrifices made by military children
Black and red: Usher wore a pair of black leather trousers and leather jacket while he added colour with red trainers
Heart and soul: The Soul Children of Chicago choir performed looking smart in their red blazers
Men in Black: Mindless Behavior gave an impressive performance in their smart black suits
Host: America’s Got Talent host Nick Cannon oversaw the evening’s entertainment
Fringe benefits: Michelle Obama gave a speech at the event honouring the children of military families
Fun times: First lady Michelle Obama, took to the stage with her daughters Sasha (L) and Malia (R) who looked excited to be there
One and two: First lady Michelle Obama gave Jill Biden, wife of Vice President Joe Biden a massive hug during the Kids’ Inaugural
