Travis Barker and Shanna Moakler Separate - Again  7/13/07

Rocker Travis Barker has separated from his wife Shanna Moakler again, just four months after the couple reconciled.

The Blink-182 star and Moakler first split last summer (06), at which time Barker filed for divorce.

The couple got back together in March (07), but went their separate ways again last month (Jun07).

A source tells website People.com, "She moved out and, as far as she's concerned, it's over. She loves him, but it's one of those relationships where they keep trying to make it work but it doesn't.

"She's very upset. She gave this marriage her all."