Ashlee Simpson and Vincent Piazza Split, She's Single

ashlee and her boardwalk empire bf split

Ashlee Simpson is single again, having recently split from her 'Boardwalk Empire' actor boyfriend Vincent Piazza.

The 28-year-old sister of fashion designer Jessica Simpson filed for divorce from rocker Pete Wentz in February 2011 and hooked up with Piazza a few months later.

It appears Vincent's busy schedule and the fact that his home base and film location is in New York City is to blame for the breakup.  He portrays a gangster on the successful HBO show that is now in its third season.

This is perhaps why Ashlee has been joined-at-the-hip recently with her successful older sister during a number of Jessica's promo appearances.

The mother of 4-year-old Bronx hopes to resurrect her own career with the release of a fourth studio album.  She dropped a new single Bat For A Heart on Nov. 21.

Check it out below:

Photo:  WENN