singalongabillity 

The innate nature of a song or group of songs that enables itself to be easily sung along with.

Operation Ivy's reptoire of songs possesses a singalonabillity that is unrivaled in contemporary punk rock.

singalongabillity by root_raven and friends (billy idol) September 13, 2003

singalongability 

Obs variant of singalongabillity.

singalongability by da3ve October 9, 2003