Man, the 80s is back pretty heavily, at least in the UK. You've got the kind of pop
popjustice talks up, which is basically all heavily rooted in 80s revivalism.. check out Rachel Steven's 'So Good' or 'Some Girls'. They're huge. And it's a given that the rock scene is stuck in the past, so of course the 80s loom large there... that topic's well flogged, though, I'm sure.
I tend to be more embarrassed by liking eg. Sufjan Stevens than Beyonce, so am not sure what to put down... 80s nostalgia, I have plenty, love most of the songs mentioned above.. disco.. I love it, although more the stuff coming from the disco scene in the States than the Euro stuff like Abba. Still, I have a feeling I'm probably alone in preferring classic disco to classic rock. Give me Earth Wind & Fire over the Zep any day!

OK, some songs I think are pretty damn bad but somehow like:
'Hands to Heaven' - Breathe (80s one-hit wonders, slow number that sounds like George Michael's slow numbers circa 'Faith')
'I Ain't Missing You' - John Waites ("At all. no way. since you been gone.")
'Jessie's Girl' - Rick Springfield ("I wanna tell her that I love her, but I guess the point is moot" - for real!?)
'2 Become 1' - The Spice Girls ("Be a little bit wiser baby, put it on, put it on..." - Baby Spice no less!)
'Iris' - Goo Goo Dolls (Fuck.. disaster.. great example of how the brain and the heart don't always listen to each other though.. how can this grab me at all??)
'It Started With A Kiss' - Hot Chocolate