I Really like most of Basshunter's stuff ^.^ "All I Ever Wanted", "Pretty Rave Girl", "Now You're Gone", and "I Can Walk on Water I can Fly" are my favorite songs by them. My dear Orihime friend introduced me to them and I am totaly in love with them now. I also just recently found out the name of "Zombie Nation" by Kernkraft 4000. If you don't think you've heard it, look up the stadium mix and I think you'll recognize it. Cascada's got a few of my all-time favorite songs like "Reason" and the classic (well, to me) "Everytime we touch" and Daft Punk's "Harder, Better, Faster, Stronger" is pretty good if you get the right version ^.^
http://www.youtube.com/watch?v=K2cYWfq--Nw It's actually really cool ^.^
Also, Kayne West's remix of Daft Punk (Called "Stronger") Is actually really fun to dance to as well. Sean Paul, Sean Kingston, Jay Sean, and Lady Gaga are also some really great artists that have bass and good beats happening. (Yes, I know Lady Gaga is a freak, but her music is great.) O-Zone is also classic with their "Numa Numa" but "New Numa" is also fun to me ^.^
I'm actually generally a techno freak. I love Electronic music, but also anything with a good beat. So long as I can move to it, I like it. Which sometimes gets me in trouble cause I ignore the words but meh ^.^
If I can think of anything else, I'll let you know, cause I always love hearing a familiar song at a rave ^.^
Oh yeah! Gackt would be amazing. I agree with Valforwing in that Vanilla is absolutely (hillarious) amazing. lol. And with Lord Noir that "Zydrate Anatomy" is also a really great song ^.^

Shading your eyes from the light between the trees, your turned around and softly smiled at me
Inside of a calm breeze, I was holding you before I even realized it
Blushing, you closed your eyes and softly kissed me
You were more beautiful than any other flower
I loved you
I always loved you
Sakurasou ~ Gackt