simpson230split.jpg Another one bites the dust!

Ashlee Simpson and Vincent Piazza have split after a year and a half together.

"There was no bad blood and no third party involved. It was honestly just a long distance relationship and it became too hard to make it work. It's not necessarily forever and they could get back together. Nobody is to blame. Just the distance," a source dished to Us Weekly.

The singer and the Boardwalk Empire star began dating in June 2011 after the blonde beauty split with husband Pete Wentz.

Miss Simpson is bound to be lonely now that everyone around her is coupled up. Her sister, Jessica Simpson, is happily engaged to Eric Johnson, and her former beau is in a steady relationship with model Meagan Camper.

Something tells us Ash won't be single for long!