Did anyone else know Owen Pallett did the strings on the last Robbie Williams single?

http://www.youtube.com/watch?v=gtOV7bp-gys

I also alwas found it weird that Emiliana Torrini co-wrote Kylie Minogue's Slow. I used to love Unemployed in Summertime when I was younger.

What major pop hits have non-pop musicians you like unexpectedly contributed to?