There was great excitement last month when it was announced that Madonna would be the half time act at this year's Eurovision.
However, doubt was cast over her appearance at the huge annual event on Tuesday when Eurovision's executive supervisor Jon Ola Sand said: "The European Broadcasting Union has never confirmed Madonna as an act."
"If we do not have a signed contract she cannot perform on our stage."
The news of Madonna's Eurovision appearance was revealed by fan site ESC Today in early April , who said she would sing two songs during Saturday night's Eurovision final.
And it does look like her star turn will go ahead as Madonna fan site Drowned World posted pictures of her landing in Israel on a private jet late on Tuesday.
Madonna, who has just Madonna confirms UK dates of Madame X tour at London Palladium - how to get tickets is tipped to sing a song from her new album Madame X and a classic from her back catalogue, rumoured to be Like A Prayer.
The identity of the first finalists for Eurovision 2019 were revealed after Tuesday night's first semi-final, with another 18 countries competiing in the second second final on Thursday.
The Eurovision odds are changing all the time, with one of the big favourites being Australia's Kate Miller-Heidke.
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