A study by academics at the University of York and Goldsmiths University analysed the properties that give certain songs the 'sing-along-able' factor. They compiled a list of the top ten most sing-able songs.

We are the Champions - Queen (1977)
Y.M.C.A - The Village People (197
Fat Lip - Sum 41 (2001)
The Final Countdown - Europe (1986)
Monster - The Automatic (2006)
Ruby - The Kaiser Chiefs (2007)
I'm Always Here - Jimi Jamison (1996)
Brown Eyed Girl - Van Morrison (1967)
Teenage Dirtbag - Wheatus (2000)
Livin' on a Prayer - Bon Jovi (1986)

article here

http://www.bbc.co.uk/news/uk-scotland-22531012