The dress in shimmery ruby red is made from chiffon and velvet and has a halter front and a plunge back.

FORBES: First Lady Michelle Obama Wears Jason Wu For The 2013 Inauguration Ball

Obama again chose designer Jason Wu, this time a custom ruby-colored halter dress of chiffon and velvet that accentuated her bare shoulders and arms.

NPR: Smaller Crowd, But Still Excitement This Time

Wu designed her red chiffon and velvet ball gown.

NPR: What Will Michelle Obama Do With 4 More Years?

She now emerged in velvet and chiffon as a bona fide trendsetter.

NPR: Michelle Obama Wears Wu To The Balls Again