Help Fill an iPod

In an effort to expand her musical horizons, a friend of mine is looking for other people's opinions. Help her fill her ridiculously large memory iPod and tell me your favourite:

a) song from the 70s, 80s, 90s and, uh, this decade.
b) love song
c) break-up song
d) summer song
e) cleaning the house song
f) song of all-time

Drop 'em here or email them to me (titles only). She thanks you in advance.