One of this year's favourites, Netta from Israel, performing in the first semi-final in Lisbon.
So, we have set you a quiz to test your knowledge of this year's participants.
Australia's Jessica Mauboy will perform We Got Love in the second semi-final, kicking off at 5am (AEST) on Friday.
Held since 1956, Eurovision is the longest-running worldwide song competition broadcast on television.
Christian Tierney, the director of the video for Ryan's song Together, shared a clip of Ryan's performance on the night with the caption, "Up the town" and an tricolour emoji. "That I think we all believe that it has a life beyond Europe and we need to be careful how we look at that".
The grand final takes place this Saturday.
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Donnelly announced that he will be voting to confirm Haspel after a " tough, frank, and extensive discussion". With two Democrats now backing her nomination-the first to do so was Sen.
The UK will be represented in the final at Lisbon's Altice Arena by 29-year-old singer SuRie with her track Storm. It got a 98% audience share in Iceland past year, even though the country's entry, Paper by Svala Björgvinsdóttir, did not make the final.
"It's just dawned on me the mammoth task ahead and how important it is for Ireland to succeed this year in Eurovision", he said.
Well, only the best, strangest, most eclectic TV song contest that has ever existed. In fact, the dance almost lands on the country's three-year-anniversary of the historic referendum.
"There have been talks with the BBC, they really want me to do it", Saara had told The Sun newspaper a year ago.
As a member of the so-called "Big Five", Germany gets to side-step the semi-finals and he'll perform directly in Saturday's final with You Let Me Walk Alone.