I mean it depends on what country you're from, but I'd be surprised if you haven't heard at least one of their songs. Some of their popular ones include:
This one isn't as popular but one of my favourites:
I like them a lot, can't get enough of them. What about you?
Most Helpful Guy
Seen them. They raised to fame incredibly fast and I hope they can sustain it. I think that they have a long way to go, and depending on their goals, on whether they want their music to last the test of time like Bob Marley. I do, though, wish them all the best and hope they get even more singles on sound tracks and hit songs to sustain an enduring musical and concert career.1
Most Helpful Girl
My friend showed me them last year, I love them!
I think they're very versatile. They have their usual stuff, which is awesome. but they also do slower songs and covers, which are just as awesome.
If you haven't hear some of their slower stuff, you should check these out:
And these covers, the first one is popular, the second one is debatable among most fans of My Chemical Romance: