13-year-old Talia Joy Castellano, was the young YouTube star.  She was Ellen's official iHeartRadio Music Festival coorispondent last year.  She inspired millions with her love of life.   But has regretably died after a long battle with cancer.  She was even an honoary Cover Girl.   Here Facebook page announced the tragic loss: “It is with a heavy heart that we share with all of you that Talia has earned her wings at 11:22am."