Her Madgesty officially joined Instagram on Feb. 10, and boy did she ever make her presence known. The Queen of Pop announced her arrival by posting this racy photo of herself along with the message, "Cheers mother------! I'm on instagram." Madonna has been employing her "Look at me! Look at me!" tactics on the photo sharing site ever since. On Feb. 25, the pop diva posted a screen grab from Instagram alerting her that she'd already violated the site's community guidelines. Well, that was fast!