Michelle LaVaughn Robinson Obama is the First Lady.
There is no salary for the first lady.
Michelle Obama is the first lady of the US as of 2009.
Honorable First Lady of The United States:
No, the First Lady does not have her own dedicated plane.
If you mean first ever, first lady, it would have been Martha Washington
The current first lady is Michelle_Obama, wife of President Barack_Obama.
The current first lady is Michelle_Obama, wife of President Barack_Obama.
Michelle Obama
Currently (in December 2015), the First Lady is Michelle Obama; she is the first woman of color in US history to be First Lady. When her husband Barack Obama's term as president ends, the US will have a new president and a new first lady---or if a woman wins, we will have a First Gentleman.
She is referred to as the first lady.
Madison
No, she is not. She was the First Lady of Massachusetts when her husband Mitt was the governor there. But because Mr. Romney lost the presidential election in 2012, Ann Romney never became First Lady of the US.