Michelle Obama tops Forbes's 100 Most Powerful Women list, while Lady Gaga comes in an impressive seventh. Photos: Getty Images

Bust out the sleeveless top and defrost the sirloin-steak ball gown -- two of our favorite fashion trendsetters have just landed on Forbes's 100 Most Powerful Women list.

The magazine gave First Lady Michelle Obama the top spot, citing her as a "true change-maker" who has "given a new generation of girls and women around the world a role model."

No kidding. The woman made Isabel Toledo and Jason Wu household names, made us make a mad dash to J.Crew and Talbots, and even got us to do push-ups. That's pretty powerful.

Meanwhile, Lady Gaga -- who just this week has inspired a meat necklace and Bruce Willis's ground beef hairpiece -- came in seventh on the list. Hair dresses all around!

Other notable style stars who made the cut include Beyoncé (#9), Angelina Jolie (#21), Madonna (#29), French first lady Carla Bruni-Sarkozy (#35), Heidi Klum (#39), Sarah Jessica Parker (#45), Serena Williams (#55), Anna Wintour (#56), Venus Williams (#60), and Gisele Bündchen (#72).

Designers Tory Burch (#88), Vera Wang (#91), Donna Karan (#96), and Burberry exec Angela Ahrendts (#97) were also included in the prestigious list.

Good work, girls!

Speaking of fab women, check out Christina Hendricks in this month's Harper's Bazaar.