Diem Brown hated to lose. She had an irreverent sense of humor. She loved to dance. More than anything, she never wanted to be seen as a quitter. All of those qualities were on display in the last days before her death on Friday at age 32, a time during which she fought to reconcile her devastating cancer diagnosis with her unyielding will to live. "We kept telling her, 'This is not giving up. You have fought enough,' " says her close friend Julie Rotondi. When the MTV Challenge star finally decided to forgo any further treatment on Thursday, she...