I have many that put me in a good mood. One of those happens to be What A Feeling by Irene Cara from Flashdance.
Other songs that get me feeling good are:
No Sleep Tonight by the Faders
Respect by Aretha Franklin
Dirty Little Secret by All American Rejects
I'm Good by Blaque
Are just a few. What are some songs you always catch yourself singing to? Songs that can always make you feel better. Songs that make you want to get up and dance.
The Grove - Earth,Wind & Fire
Clocks - Coldplay
Musicology - Prince
Mr. Brightside - The Killers
Anything by the Jackson 5 !
Rule The World - Take That
Rock Your Body - Justin Timberlake
Valerie - Mark Ronson
Bouttique In Heaven - JT
and many more 
Fergie-Clumsy,,,Avril_lavigne_im with you,,,Nelly - Wadsyaname It`s make me feel good 
I have a ton, but my Ultimate would have to be Joy to the World(Jeremiah was a bullfrog) by Creedence Clearwater Rivival. I have just always loved this song and Im always singing it in my head when Im in a chipper mood.
yeah...its the first day of my 3 week vacation..that song is not by CCR its by Three Dog Night.... 
Have fun with your 3 week vacation allourregrets. I wish I had a longer Christmas break from school. I only get 12 days off including the weekend days.
Whine Up - Kat Deluna
Party Starter - Will Smith
La La - Ashlee Simpson
Somebody Told Me - The Killers
and finally Just Fine - Mary J. Blige.
I have so many feel good songs however these are the ones that are my faves!