Jessica Simpson and John Mayer have broken up again - this time, apparently, for good. A source close to Mayer says: "It has been rocky and it had been rocky, and it reached the end of the road. It is definitely over â€" the relationship has ended."

A source close to Simpson confirms: "They broke up Sunday night, but who knows what the future will hold. This is the twelfth time they've broken up. Their relationship is volatile. Last week they felt better than ever. This week, things are rocky. Who knows what the future will bring."

These guys are on and off again so often there's no point even talking about it. By the time I finish this sentence they'll already have gotten back together and broken up like seven more times. Which is slightly more than my relationship with Jessica Alba. Look, baby, it's over. The late night calls pleading for just one more night of ravaging are getting creepy. Have a little dignity.