The music group Sleigh Bells has been around since 2010, and they've been on my radar since early 2011. However, I only started listening to them recently. I've found that most of the songs I've listened to pump me up! Their music is described as noise pop: a subgenre of alternative rock developed in the mid 1980s in the UK and US, that mixes atonal noise or feedback, or both, with the melodic instrumentation and production elements more often found in pop music, making it more melodic and angst-free than noise rock. (Source - Wikipedia)
In other words, the songs sound cool.
If you need some different tracks for your playlists, check these out: