Michelle Obama made a daring decision to return to the same designer who created her Inaugural Ball dress four years ago --- and the risk paid off.

The First Lady looked extremely attractive in a thin, sweeping, and ruby-colored dress by designer Jason Wu. She teamed the dramatic dress with heels by Jimmy Choo and a diamond ring by Kimberly McDonald.

She surprised the fashion establishment by returning to a Wu design which had been the custom made for her.

Four years ago at her first Inauguration Ball, Michelle shimmered in an off-white, one-shouldered floor-length dress by the designer.

Wu, who was 26 at the time and had only been working in fashion for three years, saw his career take off after the First Lady's surprise decision to wear one of his dresses.

He said at the time that he was unaware she had chosen the dress and had been watching at home on his couch and eating pizza when she appeared.

After her 2013 decision, Wu told Women's Wear Daily: "Mrs Obama likes to keep her secrets. She fooled me again."

Wu released a women's clothing and accessories collection at Target last year and continues to be popular with the First Lady for official engagements.

The sleeveless, cross-halter neck dress with low-cut back flattered 49-year-old Michelle's arms and neat waist.

It had been created especially for her by Wu and was a departure from the dark and plain colour tone she stuck to at earlier inauguration events.

Mrs Obama's new hairstyle -- she had bangs cut on her birthday last week had been loosely tousled for the special night.

Vice-President Joe Biden's wife Jill also looked attractive in a blue silk dress by Vera Wang at the Inauguration Ball.

What are the answers to this following set of questions:

1. what did Michelle do with her hair for her birthday?
2. who did she choose as her designer?
3. Was Jason expecting it the first time?
4. how did he say she fooled him?
5. what kind of a dress did she wear when she was 49?
6. what part of her body looked good?
7. were the shoes designed by Wu?
8. who were her heels by?
9. what year did she first wear his design?
10. how old was wu then?
11. how was the dress different?
12. what kind of dress did she wear 4 years ago?
13. Which retailer does he work with?
14. who designed Jill's dress?

Numbered answers:
1. she had bangs cut
2. Jason Wu
3. no
4. By wearing the dress
5. sleeveless, cross-halter neck dress with low-cut back flattered 49-year-old Michelle's arms and neat waist.
6. arms and neat waist
7. unknown
8. Jimmy Choo
9. 2013
10. 26
11. departure from the dark and plain colour tone she normally wore
12. off-white, one-shouldered floor-length dress
13. Target
14. Vera Wang