Describing herself as "50 and fabulous" the "Let's Move" she is ready to show herself on Saturday in some dance moves with a big birthday celebration at the White House.
"I have never felt more confident in myself, more clear on who I am as a woman" the first lady told last summer when asked about approaching the big 50 birthday.
That confidence was on full display when she recently took on the topic of aging and whether she'd ever consider plastic surgery.
"Women should have the freedom to do whatever they need to do to feel good about themselves" Mrs Obama said in an interview with People magazine set to released on Friday, her birthday.
"Right now, I don't imagine that I would go that route, but I've also learned to never say never".
She's always felt her life is "ever-evolving".
"I've got to keep figuring out ways to have an impact, whether as a mother or as a professional or as a mentor to other kids" said the First Lady, who has made talking with teens and increasing the college graduation rate among her major issues during her husband's second term as president.
Happy Birthday Michelle!