Here are a few on my list:
311 - Amber, Come Original, Love Is What I Got, Love Song For No One (and most of the rest of their stuff)
The Killers - Mr. Brightside or Somebody Told me
Kanye West - Jesus Walks, The Workout Song - if you have never heard this you have to look it up and give a listen!
The Donnas - I want you to want me
Spicegirls - Wannabe (I saw this on that credit card commercial and couldn't get it our of my head)
Sara Evens - Born to Fly (usually at the begining or end)
Gretchen Wilson - When it Raisn, I APour, but I like just about anything of hers.
Big and Rich - Save a horse, ride a Cowboy, or Big Time
Gwen Stefani - Holla Back Girl or If I was a Rich Girl, or South side (w/Moby)
Mariah Carey - It's Like That
Shania Twain - I Ain't No Quitter, Party For Two
Britney Spears - Toxic, Stronger, Breath On Me, ect.
Faith Hill - Mississippi Girl
Baby Bash - I'm Back
Akon - Locked up, Mr.Lonely
50 Cent - Disco Inferno, Candy Shop
Black Eyed Peas - Don't Phunk With My Heart, Pump It, Hey Mama
Alison Krauss - Restless, Lucky One (warm up or cool down)
Ashanti - Happy, Rock Wit You
Sugarland - Gotta Be Something More, Baby Girl