30 Days of Music - Days 11 + 12

These music posts dont seem to be getting too many comments so i feel like i'm doing them mainly for myself but anyhoo, i'll carry on... if only to prove that i can keep a theme challenge going for the required amount of time! So day 11...
Day 11 - For you, what song defines the 80's ?

Do i even have to explain this one? Title song from the biggest selling album of all time, geniusly talented ( if somewhat personally dubious ) artist....yada, yada, yada.

Day 12 - For you, what song defines the 90's ?
Because the 90's the decade i grew up, the one where i really started to love and appreciate music, where i started out a 6 yr old listening to teeny bopper pop and finished up a cranky 16 yr old girl rocking out to the Foo Fighters, Live and Silverchair.... i've had a tough time answering this one. However, i thought really hard and came up with this -

I think " All The Small Things " by Blink 182 sums the decade up for me because its kind of a middle ground between the boy band pop that i started with and the grunge/metal/rock boys i ended up with. Plus its a funny song and one that everyone at my school loved when we were in Yr 10. It might have been released in 1999 so it only just makes the 90's, but its the song that defines the decade for me...