America's Sweetheart is celebrity or other well known figure who is very kind, down to earth, humble and who is generally loved by Americans. It is someone who is very likable and relatable and who is always kind and respectful on and off camera. America's Sweetheart would never snap at an interviewer or be rude to one of their fans. They would never pull cheap stunts to garner attention and publicity. America's sweetheart is someone we'd all like to be friends with.
So, who is it? Hopefully I didn't forget anyone.
Reese Witherspoon
Taylor Swift
Jennifer Aniston
Michelle Obama
Betty White
Kelly Clarkson
Julia Roberts
Zooey Deschanel
Sandra Bullock