Anyone know some really catchy dance songs?

yes i do...

Yes. Anything by 3OH!3, Cobra Starship, Lady GaGa or Shiny Toy Guns. :D

If you can find the clean version, Boom Boom Pow by the Black Eyed Peas is a fun song with an awesome beat. Jai Ho is good too. Evacuate The Dancefloor by Cascada is fun. Cha Cha Slide is a fun classic song that comes with instructions on how to dance to it. C:
Footloose is another classic. There are some fun Jump5 songs that would work for dancing too, like I've Got the Music in Me, All I Want, Tell Me Why, and Start Jumpin'.
That's all I can think of right now. :3

Everytime We Touch by Cascada
Heaven by DJ Sammy ft. Yanou
Calabria by Drunken Monkey
Carmelldansen by Carmell (It can get annoying if played too much.)

These are my favorites:

- We Are Golden by Mika (Calvin Harris Remix)
- Good Girls Go Bad by Cobra Starship
- Standing In The Way of Control by Gossip
- Dive Into The Pool by Barry Harris
- Swing Baby Swing by The DNC
- Clothes Off by Gym Class Heroes
- One More Time by Daft Punk
- Proud by Heather Small (Peter Presta Remix)
- You're Free by Yomanda

any la roux song and lady gaga song,michael jackson songs,some white lies songs,possibly even some lily allen and florence and the machine songs...

freeze by t-pain ft chris brown

Trance/Dance sound:
Every Word- Ercola =D Great song.