Sirena is a poor man's Epica which is a middle class man's Nightwish. They can't seem to hold on to decent female vocalists and they're prone to overusing death grunts (as with Epica), but they do have their good songs, this is one of them (and a decent enough music video, cheesy effects though).
[youtube]njPWBTIv9qw[/youtube]
As for Epica, I love Simone, she's got an operatic voice like Tarja (and damn close in talent if not equal) and has the added bonus of being incredibly hot. Downside with Epica is the occasionally "preachy" lyrics and death grunts. For some reason the male vocals in this song sound twice as bad as they actually turned out in the album.
I really like seeing videos from studio recordings too. Epica has a lot of them, too.
[youtube]Dys1_TuUmI4[/youtube]
A bit off-topic, this is just an awesome song.
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And now for something COMPLETELY different. Like watching a trainwreck (Calm down, if there's any juggalos here).
[youtube]_-agl0pOQfs[/youtube]