Atração Fatal

An anonymous brasilian woman called my work phone on Saturday and sang a children's song to my answering machine before hanging up. I'm incredibly creeped out!

I only know one brasilian woman in London, and it wasn't her voice (plus, she would never do such a thing to me.) So I've been cracking my brain trying to figure out:

a) Who is this person and how did she find my work phone?
b) Why did she leave me such a creepy message? (though my co-workers think it's more like the silly humour of someone stoned)
c) Will she be calling again and, if my boss picks up, what will she say?

If the caller was one of you, please let me know.

The song was Amiguinha Xuxa.