Once all the songs are performed then viewers in each country gets to vote for their favourite apart from their own country.
Israel's public broadcaster KAN confirmed the 60-year-old icon will make an appearance on stage, with the expected $1million (£770,000) cost being met by Israeli-Canadian billionaire Sylvan Adams.
The 2019 Eurovision Song Contest is scheduled to be held on 14, 10 and 18 May at the Expo Tel Aviv in Tel Aviv, Israel.
Despite all the hype that began once the BCC reported the news, Eurovision organizers said that "no final decisions have been made, or agreements signed".
During the music contest to be held in May in Tel Aviv, the star will sing two songs.
"Official news and updates will come directly from the Eurovision channels in due course".
Doctors find 4 bees living in woman's eye
Hung said that sweat bees commonly live in the mountains or near graves, which explained how they flew into the woman's eye . Her eyesight was saved but she suffered cellulitis (a bacterial skin infection) and keratitis (inflammation of the cornea).
The pop superstar, who has yet to respond to the backlash, will reportedly be paid $1 million (£770,000) by an Israeli businessman for her two-song performance in Tel Aviv.
Her decision to appear follows calls from stars including Pink Floyd's Roger Waters for an global boycott of the 64th edition of the televised singing contest.
Pro-Palestinian groups and organizations called on Madonna to cancel her performance at the song contest in Israel in May.
Reality show victor Michael Rice will represent the United Kingdom in this year's contest, performing a track called Bigger Than Us.
Israel won the Eurovision Song Contest for the first time in two decades a year ago, with Netta Barzilai's women's empowerment anthem, "Toy".