Many, but I'll have to do it by artist, there's too many songs. I'm not actually ashamed of any of these, but I think they fit the bill.
As far as pure pop, I like both Britney and Xtina (better of the two), but my all time favorite of the style is the Spice Girls. I also enjoy Mel C's solo work.
As far as rap, I like Ludacris (a lot actually... he's growing on me), Nelly and his associates. I like that Cash Money stuff, and not only Juvenile. G Unit. Necro, who I'll admit sucks, but I like him anyway. Early ICP.
Let's see, on the rock side, I actually am starting to like Korn. Monster Magnet are some of my favs, I'm not exactly sure what people think of them. Marilyn Manson (who nobody should be ashamed of, but they are) Andrew WK
Any hair metal. The Hives, Graves era Misfits, and let's see... Fatboy Slim and Paul Oakenfold.