"Irreconcilable Differences"...

Jessica Simpson has officially filed for divorce and "irreconcilable differences" is what she cited as the reason for her and Nick's divorce. She's requested to have her last name officially changed back to Simpson and she's also asked the court not to award spousal support to Nick.
Lachey, who has hired Los Angeles-based attorney Laura Wasser, was not surprised by the filing, a source close to him tells PEOPLE. "He was hoping for the best, but as time went by, he was prepared for what became inevitable," says the source. "(He and Jessica) hadn't spoken in a couple weeks. I think they have spoken about the actual serving of papers."
Awwww, how sad, It's really over. Well, check out some pictures of them during the holidays (and one from their wedding) in happier times...

People