Michelle Obama's most memorable looks as first lady

The first lady has become known for a more modern, experimental style than her predecessors, and Monday night was no exception.

First lady Michelle Obama is never boring when it comes to style, and Monday at the Democratic National Convention was no exception.
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Mrs. Obama wore a custom-made royal blue dress by American designer Christian Siriano to stump for Hillary Clinton at the convention's opening night in Philadelphia.
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First Lady Michelle Obama waves as she speaks to delegates during the first day of the Democratic National Convention in Philadelphia , Monday, July 25, 2016.

Matt Rourke/AP Photo

It was just the latest colorful addition to a long line of buzzed-about dresses worn by the first lady, who has become known for a more modern, experimental style than her predecessors.
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Here are five of the first lady's looks we won't soon forget:

2008 Democratic National Convention

This Aug. 28, 2008 file photo shows then-Democratic presidential nominee, Barack Obama and his family, Sasha, Malia and Michelle at the Democratic National Convention.

Ron Edmonds, file/AP Photo

2009, first inaugural ball

President Barack Obama, left, and first lady Michelle Obama, right, are introduced at the Neighborhood Inaugural Ball in Washington, Tuesday, Jan. 20, 2009.

Pablo Martinez Monsivais/AP Photo

2012 Democratic National Convention

In this Tuesday, Sept. 4, 2012 file photo, first lady Michelle Obama walks onto the stage at the Democratic National Convention in Charlotte, N.C.

Jae C. Hong, File/AP Photo

2013, second inaugural ball

This Jan. 21, 2013 file photo shows President Barack Obama and first lady Michelle Obama at an Inaugural Ball during the 57th Presidential Inauguration.

Carolyn Kaster, File/AP Photo

2016, White House Correspondents' Dinner

President Barack Obama, right, kisses first lady Michelle Obama, left, after he spoke at the annual White House Correspondents' Association dinner, April 30, 2016.

Susan Walsh/AP Photo

The Associated Press contributed to this report.