def vagalume(song):
    """
    Returns the lyrics found in vagalume.com.br for the specified mp3 file or
    an empty string if not found.
    """
    translate = {
        '@': 'a',
        URLESCAPE: '',
        ' ': '-'
    }
    artist = song.artist.lower()
    artist = normalize(artist, translate)
    artist = re.sub(r'\-{2,}', '-', artist)
    title = song.title.lower()
    title = normalize(title, translate)
    title = re.sub(r'\-{2,}', '-', title)

    url = 'https://www.vagalume.com.br/{}/{}.html'.format(artist, title)
    soup = get_url(url)
    body = soup.select('div#lyrics')
    if body == []:
        return ''

    content = body[0]
    for br in content.find_all('br'):
        br.replace_with('\n')

    return content.get_text().strip()