Suggestions anyone?

Every now and again I look at my ample CD collection and realize the same thing. Damn, it's sad. Well maybe not sad, but full of sad, angry or down right depressing music. Aside from Bon Jovi and a few others, there's not much there to serve as a pick me up.
Recently I've felt the need for some happy fun music, but can't decide where to look for some (except I know I won't find it on my CD rack). So I'm soliciting suggestions from my music-loving friends for some upbeat music. Help is much appreciated, because I can only dance around to a certain song from a certain former boy band member so many times before I start to feel ridiculous.