Sad story.

Remember Cha Cha DiGregorio from Grease? She was the one who danced the Hand Jive with John Travolta.

Well she died today at the young age of 63!

According to TMZ, She was had difficulty breathing about a few months ago and they found that she had cancerous tumors on her lungs.

How SAD...that's too young and so sudden!

Here she is in the movie Grease.