Will Young won Pop IDOL, a search to find solo stars. Gareth Gates was runner-up. Popstars was won by a group called Hear'Say (now split up). The runners up in that were the more successful and better Liberty X (originally called Liberty).
There was some controversy in that Simon Cowell, a judge on Pop Idol and a big wheel in the music industry, wanted Gareth to win. Gareth seemed like more marketable teen pop material and there was some upset. There were also claims that people couldn't vote for Gareth as phone lines were jammed.
I don't think people mind them being in the charts too much - but no-one seems to think they will be around forever. Real music will win through in the end.