Madonna Joins Instagram, Uses It to Post Sweaty Cleavage Picture

Madonna is now on Instagram. It's a surprising move by the Material Girl -- not because of the recent brouhaha over the Facebook-owned photo app, but because we're shocked she wasn't already a member.

It's good to see that the legendary Material Girl caught on quickly, posting three random photos over the past three days that provide a small glimpse into her daily life -- from drinking a martini to how she looks after a hard workout (just like you do: sweaty!)

Madonna's already managed to amass a considerable number of Instagram fans, with over 66,000 people already signed up as followers.

You can check out Madonna's Instagram page here, and her new photos below.