What are some good song/artists to add to my iPod?

I need more music on my iPod and I thought it would be fun to get suggestions from other people. I'm into the country music, pop, r&b, rap, dance.....music that gets played on stations like Kiss FM and B96 and music you hear at clubs that you can dance to. I would like suggestions of current, new songs and artists. Also...90's music as well....like La Bouche, Real McCoy, etc. But I have a hard time thinking of artists and names of songs, so any suggestions would be greatly appreciated!