First lady hopeful Michelle Obama says that a recent John McCain campaign ad characterizing her husband as a self-involved celebrity on the order of Paris Hilton and Britney Spears has it all wrong. "It's funny to have anybody characterize Barack as an elitist," Obama told "Good Morning America" co-anchor Robin Roberts during an exclusive interview. "You know, this is the kid who was raised by a single mother, who didn't have access to many resources, who, you know, has walked away his entire life from lucrative careers to work in the community," she said of the presumptive Democratic presidential nominee....