I have a playlist on my ipod that I shuffle through. I change it up every few months. It's really full of oldies right now.

But I find "Don't Stop Me Now" and "Any Your Bird Can Sing" a million times more energizing than anything by any pop Princess.
I also think Beth Ditto of The Gossip aside from having an
amazing voice is such a great example of loving your body that she just has to be on there.
And then I just love musicals, and my current favorite is Reefer Madness (with Ms. Veronica Mars, Alan Cumming, and the guy who voiced the Crypt Keeper no less)
And here it is in it's current incarnation:
"All I Really Want" Alanis Morissette
"Rocky Racoon" The Beatles
"Nowhere Man" The Beatles
"Hey Bulldog" The Beatles
"Good Day Sunshine" The Beatles
"And Your Bird Can Sing" The Beatles
"Doctor Robert" The Beatles
"Got to Get You Into My Life" The Beatles
"Days and Days" Teegan and Sara
"The First" Teegan and Sara
"Infamous" Teegan and Sara
"Pulling Teeth" Green Day
"Standing in the Way of Control" The Gossip
"Listen Up!" The Gossip
"Jealous Girls" The Gossip
"The Monkey Song" Reefer Madness: The Musical
"Little Mary Sunshine" Reefer Madness: The Movie Musical
"Tell 'Em the Truth" Reefer Madness: The Movie Musical
"Reefer Madness" Reefer Madness: The Movie Musical
"Mary Jane/Mary Lane" Reefer Madness: The Movie Musical
"Finale" Reefer Madness: The Movie Musical
"Everythingthing's Just Wonderful" Lily Allen
"Shame for You" Lily Allen
"Friend of Mine" Lily Allen
"Cheryl Tweedy" Lily Allen
"Goodnight Moon" Shivaree
"Mrs. Robinson" Simon and Garfunkel
"Te Dejo Madrid" Shakira
"Estoy Aqui" Shakira
"La Tortura" Shakira
"Killer Queen" Shakira
"Fat Bottom Girls" Queen
"Don't Stop Me Now" Queen
and the one everyone should have on their workout mix
"Hey Ya" Outkast
(Although I also highly recommmend "Don't Stop Me Now" and "Fat Bottom Girls")