Here is a great pair of mashups from ThriftShop XL using "Young Folks" from Peter, Bjorn and John.
ThriftShop XL - Young Folks In Rehab
http://www.youtube.com/watch?v=hy2B_4DuXcc - Peter Bjorn and John "Young Folks" vs Amy Winehouse "Rehab"
ThriftShop XL - Young Folks Love Cats
http://www.youtube.com/watch?v=SJ2CN7qa8Ms - Peter Bjorn and John "Young Folks" vs The Cure "Lovecats"