Basically the song (s) you'll be enjoying the summer to.
Most Helpful Guy
Way too early for me, and I don't think that I'll have a definitive summer song there will probably be a handful of songs/possibly albums that will mean the world to me. Music is strange for me because I've been hating mainstream/billboard top 200 shit since I was a child. Hell my favorite singer as a kid (when I was 3/4yo) was Phil Collins, that's an insanely amazing choice for a child because that man makes music aimed towards adults & he is very talented more so than most modern musicians (especially billboard top 100 acts)
Also it's hard to plan when I'll discover an album/band/musician who will have profound effect on me, it can occur anytime in the year.
BUT here's some random examples that I can remember
summer 2007 Silversun Pickups- melatonin album/ Say hi (to your mom) - Hooplas involving circus tricks/ Snow Patrol - Run
sum 2008 Explosions in the Sky - your hand in mine & greet death/Godspeed You! Black Emperor - 1st 3 albums/ Slowdive - Alison/ Drop Nineteens - Winona