My top 6 all time favorites:
Without Me- Eminem
Don't Stop the Music- Rihanna
One More Time- Daft Punk
Harder, Better, Faster, Stronger- Daft Punk
Technologic- Daft Punk
Calabria 2008- Enur
Others:
Hollaback Girl- Gwen Stefani
See You Again- Miley Cyrus
Satisfaction- Benny Benassi presents The Biz
The New Workout Plan- Kanye West
Stronger- Kanye West
Hips Don't Lie- Shakira
Devour- Shinedown
Gimme More- Britney Spears
Toy Soldier- Britney Spears
OK, well pretty much the entire Blackout album by Britney Spears
I Kissed a Girl- Katy Perry
Forever- Chris Brown
Get Up- Chamillionare & Ciara
Disco Inferno- 50 Cent
Sugar- System of a Down
I Stand Alone- Godsmack
The Anthem- Good Charlotte
Just Dance- Lady Gaga
I'm in Miami B***h- LMFAO
Finding Out True Love is Blind- Louis XIV
Just Fine- Mary J. Blige
Gossip Folks- Missy Elliot
Uprising- Muse
Promiscuous- Nelly Furtado
Maneater- Nelly Furtado
Funhouse- Pink
I Write Sins Not Tragedies- Panic! At The Disco (but I always want to sing this one out loud at the gym, lol)
Crushcrushcrush- Paramore
I agree on the Pitbull suggestion a PP made, my favorite is Go Girl
Some Postman- The Presidents of the United States of America
When I Grow Up- Pussycat Dolls
No One Knows- Queens of the Stone Age
Higher Ground- Red Hot Chili Peppers
Temperature- Sean Paul
I'd say BEP, but it looks like they're covered
Love Today- Mika
4 Minutes- Justin Timberlake & Madonna
SexyBack- Justin Timberlake
Let It Rock- Kevin Rudolf
Low- Flo Rida
Because We Can- Fatboy Slim
Remedy- Seether