The jury votes make 50% of the final result in each semi final and the grand final. There are strict rules, 5 people in a jury, equitably balanced male / female and professional music experts like musicians or journalist. It has been highly discussed that juries might be corruptible. To avoid this all names of the jury member must have been published to everybody to avoid uncertainties. By now some of the members have already been exchanged in several countries.
The EBU is open for advices when there would be people in the national juries who do not belong there. Therefore it’s open and transparent to guarantee a fair voting.
Some of the jury members have already been singing at the Eurovision Song Contest, here a few examples:
Inga & Amish (Armenia), Stella Jones (Austria), Charlie McGettigan (Ireland), Liam Reilly (Ireland), Moshe Datz (Israel), Paul Abela (Malta), Nelea Ciobanu (Moldova), Stefan Filipovic (Montenegro), Magdalena Tull (Poland), Szczesniak Mieczyslaw (Poland) and Ruth Jacott (Netherlands).