it was on kyle xy last week when Andy found out she was in remission for cancer.
it sounds like he's saying...
"You better run....you better run..."

i like it a lot but i cannot figure out what this song is

http://abcfamily.go.com/abcfamily/path/section_Shows+Kyle-XY/page_Video-Kyle_Full_2020

jump to 7.00 and make sure it is episode "primary colors/blackout"
right when the girl says "I'm officially in remission" listen to the song