Lovato "totally fine" after car accident

Demi Lovato has revealed that she had a car accident on Tuesday.

The 17-year-old Disney Channel star, whose boyfriend is singer Joe Jonas, said that she crashed because she was feeling "sleepy".

Lovato wrote on her Twitter page: "Today hasn't started off so great. I was so sleepy this morning I got in my first little accident in my car. "

She later wrote: "To everyone who asked, yes - I'm totally fine! Thank you! Haha just was a huge bummer."