there are soooo many options but it's gotta be this one, it's just so good and thematically it works really well, all the lyrics still make sense in the context of the 1920s.
I have been loving listening to the julian casablancas / daft punk collaborations and so i revisited this oldie and it holds up, even though i remember how much they beat this track dead on the radio when i was a kid. right now it really makes me feel like i am 23
this is a tough one. my answer will vary heavily depending on the genre and there are genuinely so many to cover from 2000 to 2009. however, if i was forced to listen to only one song on repeat, it'd probably be this one.