I also just now listened to the song. That's terrible! Don't give me a UK pop song!! Who wrote that garbage?! There's no way that can make sense! I was going to give FFXIII a chance, but I might not after hearing that.
Dunno who wrote it, but she's famous because she won a talent show presented by Simon Cowell (the most famous person in the world, according to British schoolchildren), so its banality is no surprise.
Thankfully,
Cowell's latest prodigy got pwnt by the internet this week 
UPDATE:
FF13 sold 1.5 million copies in its first week (slightly more that NSMBW and Wii Sports, according to VGChartz), but the Internet still hates it.