Jessica Simpson was reportedly pissed off after being mistaken for little sister Ashlee by boyfriend John Mayer.



Jessica was with Mayer when he allegedly pointed to a picture of Ashlee on a magazine cover and asked "How old is this picture of you?"

Jessica is said to have lost her temper with Mayer and insisted she and sis Ashlee look totally different.



Too funny!! John thinks both sisters are hot!

Labels: jessica simpson, john mayer