I'm not surprised either.
Although I did watch Popstars the Rivals, it was a bit like my 'BB1 Syndrome' - after it had finished, I wasn't the slightest bit interested in following the fortunes of the winning bands.
Jbellemeg - I think you're referring to Pop Idol, rather than Popstars (that gave us the late lamented Hear'say!!). Confusing, isn't it?
Pop Idol for me definitely comes under my 'BB2 Syndrome', where I am genuinely interested in following the progress of Will, Darius, Zoe (and yes Miriam, even Gareth!). Especially lovely Will.
You need more than a TV programme to make someone, or a group of people, into a star - they have to have 'star quality' to begin with, and I don't think either Girls Aloud or One True Voice have that.