Jessica Simpson The grapevine has it that Jessica Simpson isn't very happy at the mo.

But who's taken the wind out of her bunny-like aura?

Well, chit-chat has it that her ex John Mayer has ruffled a few feathers.

Jess was reportedly gutted when snaps emerged showing her former flame getting all loved up with one Jennifer Aniston.

Y'know the type of pics: the whole canoodling by the pool, kissing backstage kinda thing that's spread through Hollywood like wild fire in recent weeks.

Us Weekly allege that Jess is more than a bit miffed by the John Mayeremergence of Johnifer, especially since simultaneous rumours are doing the rounds that Jess ain't getting on so well with her current squeeze Tony Romo.

Though Jess' denied that she and Tony are splitting up, it can't help that there's more buzz by the day relating to Johnifer's blossoming fling (which, BTW, they haven't comfirmed either - but actions speak louder than words).

Jess dated John for nine months before splitting in May 2007.

Jess' dad, Joe, told People at the time: "I love John Mayer. I love his music. I love his talent. The last time he was at the House Of Blues in Los Angeles, I went by myself to see him play."

Not sure he'll be feeling the same level of affection now.