David S Day 2

 3/6. Two pop music questions in one day? Come on. 

1. Ireland :), D32. Tricky one for me given how much political upheaval there was in 2011. But few European countries fit having a single dominant party since the early 1930s. 
2. Ac/dc :(, D02. I bet with 5 guesses I could have gotten this. 
3. Cake by the Ocean :(, D13. Would not have gotten this with 500 guesses. 
4. Tate :), D11. The Tate Modern is pretty famous. That’s what got it for me. 
5. CN Tower :), D20. Great question. “Superlative” is what got me there. 
6. Potami :(, D21. Never heard of this term. I wish I’d given even higher D now that I see the answer.