JSIMPSONGYM060706_01.jpgJessica Simpson JSIMPSONGYM060706_04.jpgIt sucks to see a relationship fall apart, but at least Jessica Simpson seems to have found a productive way to handle her split with John Mayer - work it out! The blonde bombshell graced us with a smile as she left her gym yesterday afternoon. Way to go, Jess - there's no better form of revenge than getting your sh*t together (not that Jessica's got too much sh*t to get together, of course!) and rubbing it in your ex' face!