While Katrina won the competition for the United Kingdom in 1997, with Katrina and The Waves" song "Love Shine A Light" but admitted she does not have high hopes for former "X Factor' star Lucie, who is representing the United Kingdom this year.
Russia, in response, decided not to allow her to participate by video or to send another contestant.
Ukraine won the right to host the contest after its 2016 entry came first with a song about Stalin's mass deportation of ethnic Tatars from Crimea during World War Two. Overtly political flags and banners are banned, and lyrics are monitored for provocative content.
British viewers also raised their concerns that the UK's traditionally lacklustre garnering of votes from other countries would suffer even more this year thanks to the European Union referendum result.
Ukraine accuses Russian Federation of plotting and backing the three-year eastern conflict in which more than 10,000 have died - a charge Moscow flatly denies.
Those who wanted to stay included 65% of those who voted to remain in the European Union, 70% of those who intend to vote for the pro-EU Liberal Democrats and 69% of 18-24-year-olds. It began in 1956 with just seven countries.
The contest, which aired in the USA on Logo, has launched the careers of the likes of ABBA, Celine Dion, Julio Iglesias, and Olivia Newton-John since its inception in 1956.
Sobral sang his Amar Pelos Dois (Love For Both) in a high, clear tenor accompanied by quiet strings and a piano.More news: Jose Mourinho praises Manchester United trio following Arsenal defeat
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Someone else asked: "Eurovision what exactly happened to the diversity you were meant to be celebrating?!"
Eurovision often attracts viewers for those hoping to see something outlandish or surprising (Austrian bearded drag queen Conchita Wurst won in 2014).
Onstage, many Eurovision-watchers expect this year to bring resurgence for western Europe after years of eastern and Nordic dominance.
Complex, that is, as far as Eurovision pop songs go.
A combination of viewer votes and jury votes from every country was counted to determine the victor.
Tuesday's other qualifiers for the final were Moldova, Azerbaijan, Greece, Poland, Australia, Cyprus and Belgium.
However, its odds are looking good this year as Salvador and Luisa´s song is now second favourite to win, according to bookies William Hill, with 9/2 odds. If we get no points I'll be disappointed, but anything else is going to be a win.