Ok this is the cause of many sleepless nights (trying to ID it via the lyrics...)
The sample clip is at: http://www.mediafire.com/?yc1cv1uj1zp

Chorus lyrics:
Sure
You're not
the one
I used to dream about
but sure
you're
someone who bring me down
you're not
the one
I used to dream about
etc

Other lyrics inthe clip, fairly easy to understand.
Please help and thanks in advance!