Rumer Willis legs boots shorts gas station

Ouch! Looks like Rumer Willis hasn't been too friendly to her knees.

Demi Moore and Bruce Willis' daughter made a pit stop at a Hollywood gas station with a gal pal wearing a long and loose trench, cut-off jean shorts, brown cowboy boots ... and some majorly bruised knee caps.

The 23-year-old starlet has had quite the week. On Monday, she was promoting her film The Diary of Preston Plummer in Miami. Then on Tuesday night, she performed four songs at The Sayers Club in Hollywood ... with stepdad Ashton Kutcher in the audience cheering her on.

Never a dull moment for Ms. Willis!