Eurovision is well underway and you might be wondering if all the acts perform live.
There's a lot of running and dancing, and larking around with some countries, and it seems impossible that they could do all this and sing well. Well, they can. Eurovision has a rule that all acts must perform live. But no live instruments are allowed.
The rules on the Eurovision website says this: "Each act must sing live, while no live instruments are allowed."
You can find out more rules and FAQs about Eurovision here.
Tonight, 26 acts will sing for the title of Eurovision winner for 2021, with the contest back after being cancelled last year due to the pandemic.
Twenty finalists went through this week after the semi-finals and tonight they will join the big five, France, Germany, Italy, Spain and United Kingdom, along with this year's host, which is the Netherlands, in the grand final. You can read why the UK automatically qualifies for Eurovision grand final here.
This year James Newman will represent the UK with his song entry Embers. In 2019 the UK contestant was Michael Rice with Bigger Than Us, but unfortunately, he came in last place.
You can find the full Eurovision line-up and running order here and read how to vote for your favourite Eurovision act here