The Song Festival, also known as the RTP Festival of Song, is an annual contest promoted by Radio and Television of Portugal, since 1964, with the aim of selecting a song for the Eurovision Song Contest.
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The Eurovision Song Contest often simply called Eurovision, is an annual international song competition, with participants representing primarily European countries. Each participating country submits an original song to be performed on live television and radio, then casts votes for the other countries' songs to determine the winner.