This is probably an obvious choice. Before I came to Korea, I didn't have deep knowledge of K-pop. The famous one I remember was Wonder Girls' Nobody.
Take a look at more after the break.
I know about 2pm in the Seoul advert a few years back and kinda liked the song 'Fly to Seoul (Boom Boom Boom).
I know about Girls' Generation when I was hunting for TVs. The Samsung ones always show the girls' videos. When I came back I looked up about them. I found out that Girls' Generation are starting to make a mark in the US with performances on David Letterman and Live! with Kelly. Not bad. They're going far. This is 'The Boys'
Besides the Seoul song, 2pm also have other songs I like. I remember seeing the video for 'I'll Be Back' on TV and an Akademi Fantasia contestant sang it.
'Mr. Taxi' is another song by Girls' Generation that I knew about when I was attending a K-pop themed dinner with a client company. The female employees had to dance to this song.
The boy bands, I've only listened to 2pm. Dunno about the rest. Super Junior, Big Bang etc. I don't know what's their famous song. Here's 2pm's latest song 'Hands Up'.
After reading about Wonder Girls, I found out they had a movie made for the US. Here's the single they just released called 'The DJ Is Mine'. Easier when there's an English version. :)
I also like Wonder Girls' 'Be My Baby' and SNSD's 'Gee' to name a few. I found out that not every member of all these K-pop artists are genuinely South Koreans. Some even born in the US. Maybe to make it easier when they expand to the rest of the world. Impressed how a small country is able to make such a big influence to the music industry around the world. Hope you like them. Any good recommendations?