That's hard. I love (love) Vindicated by Dashboard confessional cos it's a great shouty song that you can shout along to but I also love Mr Blue Sky becasue it's so happy and One O'Clock Jump by Jimmy and Tommy Dorsey cos it's Big Band and makes you want to dance. And Ain't No Mountain High Enough - such a warm fuzzy song!
My all time favorite and as been since I was a kid ...Don't stop me now by Queen
Was a really big Queen fan even though Freddie died the year after I got into them.
Favorite Pink song is God is a Dj
Favorite Robbie song Better man
I could go on for ever but they are my favorite three