How do they film slo-mo in music videos?

Question

In a lot of music videos these days the artist is moving and singing in slow motion. I heard somewhere that when filming they play the song slightly speeded up, then slow it to normal speed when replaying. Does anyone know if this is true or how it is done?
Cheers

Answer 1

Yeah they did that in the old film days, now you can alter the frame rate digitaly.

Answer 2

its all done with computers. go to the internet and type in the making of a music video and that should come up.

Answer 3

they actually sing the song at normal speed and every thing else is speeded up!