Get ready for a kick right in the feels. Jeremiah Succar, a 7-year-old patient at Children's Hospital Los Angeles, has stage-four atypical rhabdoid teratoid, an aggressive tumor that occurs in the brain and spinal cord. He loves Rachel Platten's 'Fight Song,' and sings it when he goes through treatments. When his parents found out about this, they knew they had to get the singer to come visit him. "Jeremiah loves "Fight Song"—he memorized the lyrics after three or four times of listening to it,…