Aniston upset by Mayer 'love letters'

Jennifer Aniston has allegedly found love letters sent to John Mayer by singer Jessica Simpson.

According to the New York Post, the actress was "hurt" when she discovered the notes inside the rocker's guitar case.

"The letters surprisingly were very touching and well written," said a source. "Jennifer was more hurt than angry at the discovery."

Mayer previously dated Simpson for nine months, but the pair split in May 2007. His other girlfriends have included Jennifer Love Hewitt, Minka Kelly and Cameron Diaz.

A representative for Aniston claimed the report was "completely fabricated".