Dang! The performance of Erik wasn't shown in the ceremonies... maybe it's for the closing concert wherein other representatives from other countries will also perform for the athletes...
Well, I saw Rain sing with some Chinese performers... but on another site, his management kept mum on his performance, just saying that it'll be something to look forward to. I don't think they're talking about that performance with the Chinese singers, though...
oh! This is the link for Erik's interview re: the invite:
http://www.inquirer.net/vdo/player.php?vid=1193