Honestly, I think we need a "what's your fave song" spot on fanpop, the amount of times people ask it...
For the billionth time, my favourite song is Knives and Pens by Black Veil Brides.
To make my answer more interesting for myself, I shall give you a list of, in no particular order, my top 5 favourite songs:
-Knives and Pens (BVB)
-Set the World on Fire (BVB)
-Hello Cold World (Paramore)
-Let the Flames Begin (Paramore)
-The Ballad of Mona Lisa (Panic! At the Disco)