Our first lady is celebrating a huge birthday today: the big 5-0!

Michelle Obama first caught the eye of the national audience while at the Democratic National Convention in 2004. From then on, all eyes were on Michelle and Barack Obama as he rocketed towards the presidency in 2008. Now, to celebrate her birthday the White House is hosting a large party on Saturday, with guests encouraged to come "ready to dance." Wait, where's our invite?!

Michelle's influence on fashion is almost unparalleled. Similar to the Duchess of Cambridge, Michelle seems to have the "Kate Effect," meaning that whatever she wears (or whoever she wears) becomes an instant success. We've seen her wear a range of clothing: from classic sheath dresses by Tracey Reese and retailer J.Crew, to a casual sweater while shopping at Target. There is something very real about Michelle, and we can't get enough of her attainable style.

Click through the gallery above to see the first lady's style transformation through the years. Happy birthday Michelle!