The only years in which I remember the most performances of were 2000-2015. So here are my rankings.
2000:
1. "Luna"
3. "Fly on the Wings of Love"
2001:
1. "Energy"
2. "Everybody"
3. "Wer Liebe Lebt"
2002:
1. "I Wanna"
2. "Addicted to You"
3. "Come Back"
2003:
1. "Sanomi"
2. "Everyway That I Can"
3. "Words for Love"
2004:
1. "Lane Moje"
2. "Wild Dances"
3. "Heaven"
2005:
1. "My Number One"
2. "Le Grand Soir"
(Yes, I know that a lot of people find that song boring, but it's such a beautiful song IMO)
3. "Hasheket Shenish'ar"
2006:
1. "Lejla"
2. "Everything"
3. "Tornero "
2007:
1. "Molitva"
2. "Visionary Dream"
3. "Rijeka Bez Imena"
2008:
1. "Oro"
2. "Hero"
3. "Fire in Your Eyes"
2009:
1. "FAIRYTALE"
2. "Et S'il Fallait Le Faire"
3. "Jan Jan"
2010:
1. "We Could be the Same"
2. "Milim"
3. "Sweet People"
2011:
1. "No One"
2. "Sognu"
3. "Watch My Dance"
2012:
1. "Quédate Conmigo"
2. "Euphoria"
3. "Nije Ljubav Stvar"
2013:
1. "Only Teardrops"
2. "Rak Bishvilo"
3. "You"
2014:
1. "Same Heart"
2. "Calm After the Storm"
3. "Not Alone"
2015:
1. "Grande Amore"
2. "Rhythm Inside"
3. "Hope Never Dies"