Ballroom dance songs?

So, I do ballroom dance competitively, and I'm looking for songs (especially popular ones that I can easily find to download) for practicing. So far, I'm basing my list off what I hear at competitions, and I have:

Waltz:

-Greensleeves

Foxtrot:

-Beyond the Sea

Viennese Waltz:

-Only Hope (Mandy Moore version)

Quickstep:

-Istanbul not Constantinople

-70's Spiderman theme (I'm not kidding, this stuff really does get played at competitions)

Cha-Cha:

-Mambo Italiano (a recent version)

Swing:

-I Kissed a Girl - Katy Perry

Jive:

-Candyman - Christina Aguilera

-Mambo Italiano (original version)

I'm looking for more songs for all of these, plus tango, rumba (both kinds), and anything else. I also heard 'Disturbia' by Rihanna at a competiton once, but I can't remember what dance it was for.