Because I love lists, I'm going to give you my Top 10 Current Workout Playlist (with added commentary because it's what I do). I say "current" because fun songs come out all the time so this list will eventually change.
1. "Shake It Out" by Florence + the Machine
Great beat, lyrics, and voice, not to mention inspiring in any part of your life that needs a little boost.
2. "I Won't Back Down" by Eminem featuring Pink
Though not my favorite genre, Rap, with its fast lyrics and heavy beats, is fantastic when sweating like a pig on the elliptical. Plus the whole 'not backing down' thing is perfect when 300lbs and facing off against workout equipment.
3. "Till I Collapse" by Eminem & Nate Dogg
This song is all about working hard "till I collapse." Though I'd prefer not passing out on a treadmill, it certainly pushes you back to the gym.
4. "Power" by Kanye West
A take charge kind of tune.
5. "Moves Like Jagger" by Maroon 5 featuring Christina Aguilera.
If you've listened to KissFM, been in a club, trendy bar, or Forever 21 in that last few months you're no stranger to the melodic (and slightly annoying) whistling of this tune. I know it's overly pop-ish with a dash of ridiculous, Adam Levine needs to be reminded that he is not actually Mick Jagger, and it's an overall strange song... but damn it's catchy and fun to exercise to.
6. "Mercy" by Duffy
I love British Pop. Listen to this song and you'll know why.
7. "99 Problems" by Hugo
One of the best covers EVER and an altogether ass-kicking song.
8. Anything by Ke$ha
Her songs are awesome for working out. I know she has a $ in her name, but if you take the time to listen to her lyrics, you'll realize most of her music is either satyrical or meant to be shallow.
9. "Nothing But the Beat"(album) by David Guetta
It's club music. Nuff said.
10. "Mariella," "We Get On," and "Merry Happy/Little Red" by Kate Nash
Kate Nash is the shit. The end.
"I Fucking Hate You" by Godsmack
"Gold Digger" by Kanye West featuring Jaime Foxx
"Set Fire to the Rain" by Adele
"Mamma Knows Best" by Jessie J
"All These Things That I've Done" by The Killers