Lindsay Lohan's ex-girlfriend's face is badly cut and bruised and she appears to be lying down resting on a bed.
The DJ, 33, posted the photo on Monday as a warning, 'Wear a helmet kids!!!'
She also Tweeted the photo saying, 'Let this be a lesson... if you have a driver's license you probably don't need to be on a bmx bike.'
She later told a fan on Twitter, 'You should see what I looked like on Saturday', adding that she had nine stitches to her wounds.
Ronson added with a smiley face emoticon, 'Just a little uglier than usual. Other than that, Vicodin is handling the rest.'