The singer followed in the footsteps fellow celebrities such as Rihanna and Beyonce byjoining the growing photo-sharing social networking site on Sunday, and she instantly caused waves by posting a picture of her cleavage.
The 54-year-old star toasted her arrival on the social networking site with a photo of her sipping a dirty martini and captioned the shot declaring: "Cheers motherf**kers! I'm on instagram (sic)"
