Out of boredom, I went on Youtube to look up some Young Justice music videos and found a ton. Most of the songs they used weren't all that good.(Considering the fact that I couldn't really see the connection between the song and the show) This is just my opinion, but these songs fit them pretty well:
Young by Hollywood Undead
Kings and Queens by 30 Seconds to Mars
Bones Shatter by Hedley
Scars by Papa Roach
Princes of the Universe by Queen
Know your Enemy by Green Day
Never gonna be Alone by Nickelback
Most of these are songs are for Superboy, because he's as cool as Robin. Sorry this isn't all that professional...