Usually when a couple breaks up and gets back together a million times you know they are pretty much doomed. Well, so is the story for John Mayer and Jessica Simpson. The crooning duo have parted ways, once again, according to PEOPLE. A source close to John says that the tumultuous relationship between him and Jess is absolutely done. "It has been rocky and it had been rocky, and it reached the end of the road," said John's friend. "It is definitely over - the relationship has ended." Jess' peeps confirm the split, but tend to think this could just be another bump in the road. "They broke up Sunday night, but who knows what the future will hold," says a player on Team Jess. "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. "
Reports that John and Jessica were kaput surfaced last month, but just days later they were seen together in New York and Cabo San Lucas. Spies say that was the couple's attempt at working through their differences. "They tried to make it work. They dated for a year," says a member of Team John. But now, "It's over." Oh well. Too bad, so sad, bye-bye.