Their vocals have really improved since the X-Factor as, quite frankly, I didn't think they were worthy winners. They have obviously worked on their harmonies with a vocal coach and now they sound great, I was really impressed with their acapella. If an artist cannot sing acapella then they cannot sing, end of, I'd love to hear Cheryl Cole do it, ROFL! Now they need to working on combining their great vocals with movement as their vocals defintely suffered in the Aussie performance, they were reasonable but not great. Definitely the best girl group we have at the moment and I'm impressed that Syco haven't chosen generic pap for their first two singles ;o)