Can Someone Tell Me This Song?

It is a small clip of a song from Steven Hall's act on Britain's Got
Talent. I want to know what song it is, I recognise but I dont know
what song. Here's the link, its from 1:16 to 1:20. (NOT 0:16 to 0:20)

http://www.youtube.com/watch?v=pDPoY07QYpw

Thanks

Its not Mambo No.5