The new-look Sugababes took to the stage a few minutes ago at T4’s Stars of 2009 extravaganza at London’s Earls Court Arena. Put simply, their live big-spectacle showing of ‘About A Girl’ was probably their worst performance I’ve seen all year. I BS you not. Sloppy, sluggish and a sore sight, the performance really drove home of the fact that it really is curtains for this once credible group. Amelle looked like she’d rather be smoking a cigarette somewhere, Heidi was…Heidi (take from that what you will) and Jade didn’t come anywhere near as hard as she usually does – especially on the vocals. The addition of dancers to their act made the whole shabang even worse, as they only served to highlight how awful the ladies were at moving…