Great topic!
I listen to a lot of different stuff, but here's my playlist of feel-good music:
Titanium by David Guetta/Sia
Keep Your Head Up by Andy Grammer
Let It Go from Disney's Frozen, sung by Idina Menzel
You Can't Take Me from DreamWorks' Spirit, sung by Bryan Adams
Get Off My Back from DreamWorks' Spirit, sung by Bryan Adams
Here I Am from DreamWorks' Spirit, sung by Bryan Adams
Roar by Katy Perry
Fight Song by Rachel Platten
Beautiful Day by U2
By the way, Dreamworks' Spirit is a phenomenal movie and I highly recommend it!