There are at least four artists active under this name & also not to be mistaken with the Belgian singer Ellektra

1/ ELEKTRA Dekker from The Netherlands, active since 2004.
She re-registered herself now at Last.fm under Elektra Goncharova.

2/ a popartist from Lithuania

3/ a popartist from Spain (?)

4/ a synthpop duo from Finland

5/ a brazilian singer