She sure does parody herself.
I think she does have a sense of humour. Either that or she is incredibly dim. I dont buy the latter, she seems to have a pretty sound business mind so, I'll say she doesnt take life toooo seriously and sends herself up.
I did rather like the comment right at the very end when walking down the steps after throwing the first pitch at the baseball game....
"I threw it so hard I thought one of my silicones was going to come out my armpit"