Avril Lavigne may have some dodgy songs that have dated badly in her back catalogue (hello, Sk8r Boi), but 'Complicated' is not one of them.
In fact, we'd go as far as to say that it's one of the better songs of that whole mid-noughties 'pop with an attitude' scene.
Postmodern Jukebox think so, too - and now the Scott Bradlee collective, who rework popular songs into an old-timey, vintage style - have covered it.
It actually works quite brilliantly with an orchestral, jazzy arrangement.
Watch it below: