Lady Gaga, Beyonce, Gisele, Michelle ObamaZuma Press; Fame Pictures; WireImage; INFphoto

Forbes announced its list of Most Powerful Women in the World today! First Lady Michelle Obama takes #8, and coming in behind her is Lady Gaga (#11), InStyle September cover girl Beyonce Knowles (#18), and supermodel Gisele Bundchen (#60). The #1 spot goes to Chancellor Angela Merkel of Germany, with Secretary of State Hillary Clinton following in second place. See the full list at Forbes.com.

PLUS: See Beyonce, Rihanna, Taylor Swift, and more show off their performance style in the gallery.

CONCERT STYLE PHOTOS!

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