Is Harry wearing an earring?
This is a video where the person who uploaded it took out the real audio and put in the studio recording. it's awful.
this has the real audio. Niall's voice cracked. Liam sounded even better than the studio recording. http://www.youtube.com/watch?v=0ZkOs6Tihy4
Look people I don't think that their lip singing or whatever but they did a really good job, GO 1D :D