How much energy?

Electrical energy to power the speaker
Magnetic energy creates the movement of the speaker
Kinetic energy transferred to the beads forcing them upwards
Beads then fall back towards the speaker with gravitational energy

There might be more but I think I'm done.

Credits
Idea, description and speaker supplied by Mr Crafty
Beads, stars, photo, song choice and bad interpretation of description supplied by Mrs Crafty
Excellent Drum beat supplied by Michael Buble's version of Cry me a River

This is my WBC entry.