Which song always fills the dancefloor at a wedding?

Starts slow, ends with the whole room shouting and bouncing in a circle. Nobody knows the middle verse and nobody cares.

The mums are up before the second line. Handbags on the floor, arms in the air, job done.

Everyone links arms and belts out the da-da-das. By the end you're sweating through your good shirt.

The one song the younger lot and the older lot both go mad for. Pure shouting, no singing required.

Three little words and the whole room joins in. Perfect for the last hour when everyone's had a few.