Sunday is first lady Michelle Obama's birthday. Above, she speaks during the World Innovation Summit for Education in Doha, Qatar Nov. 4, 2015. Reuters/Naseem Zeitoon

Sunday marks Michelle Obama’s 52nd birthday, and it will be her last one as first lady. During her years in the White House, FLOTUS has become a very popular figure, with many comparing her to Jackie Kennedy Onassis, the glamorous wife of former President John Kennedy.

A Princeton University and Harvard Law School graduate, Obama is well known for her intelligence. In fact, she met her husband when she was assigned to mentor him at the law firm where they both worked.

Before coming to Washington, the first lady had an extremely successful career, working in several fields including law, nonprofit organizations and hospitals. In the last role she held before first lady, Obama served as the vice president of community and external affairs for the University of Chicago Medical Center, where she championed giving back to the Chicago community and increased volunteerism among the center’s staff, according to the White House.

Since becoming FLOTUS, Obama has advocated for causes such as poverty awareness, higher education and healthy living. Her Let’s Move! campaign aimed at solving the problem of child obesity has been particularly noticeable. She has also been an advocate for women's rights, speaking about empowering women through education at various forums and often traveling to other countries to represent the United States or participate in panels focused on women.

But it’s not all serious policies with the first lady. During her time in the White House, FLOTUS has been noticed for her sense of humor and her style. She has often engaged with Americans on social media or through celebrities, such as when she made the CollegeHumor video with Jay Pharoah of “Saturday Night Live” to encourage teenagers to attend college.

Even more frequently, Obama has blown up the internet with fans appreciating her designer dresses at official functions. Any time in the past eight years FLOTUS has worn a particularly notable dress, it has quickly made the rounds on celebrity and fashion news sites, and social media users have demanded to know where they, too, could purchase the garment. In honor of her birthday, below are a few of the first lady’s most memorable looks from the past several years.

U.S. First lady Michelle Obama and President Barack Obama await the arrival of Chinese President Xi Jinping and his wife Madame Peng Liyuan ahead of a state dinner at the White House, Sept. 25, 2015. Chip Somodevilla/Getty Images
U.S. President Barack Obama bows to first lady Michelle Obama at his second Inaugural ball in Washington, Jan. 21, 2013. Reuters/Kevin Lamarque
Samantha Cameron, first lady Michelle Obama, British Prime Minister David Cameron and U.S. President Barack Obama pose for photographs at the White House before attending a state dinner, March 14, 2012. Mark Wilson/Getty Images
U.S. President Barack Obama and first lady Michelle Obama dance at the Southern Regional Inaugural Ball in Washington, Jan. 20, 2009. Reuters/Jim Young