Prince was voted # 24 in a list of the century (Male vocals) called the "the last Judgement". They praised him especially for his 80's work, and quoted Purple Rain, Parade and Sign of the Times as his top albums.
Other groups in the Top 30 are # 29 Led Zeppelin, 27 D. Bowie ,23 R.E.M and 21 Neil Young.
The # 1 spot is not for a prince but for a king : Elvis