Oh gosh...so many choices! Personally, I would love to hear Carrie sing any song, just so we could hear her interpretation. However, if I were to pick only a few, I would have to agree with Teenage Dream AND Firework. Katy's versions are already phenomenal if you ask me, but I think Carrie could do wonders with them also. Anyways, here's my list. If I repeat some that I have already listed, I am sorry :/
Pieces of Me - Ashlee Simpson
I'm With You - Avril Lavigne
From the Bottom of My Broken Heart - Britney Spears
Born to Make You Happy - Britney Spears
Don't Let Me Be the Last to Know - Britney Spears
Lucky - Britney Spears
Everytime - Britney Spears
Out From Under - Britney Spears
Unusual You - Britney Spears
Beautiful - Christina Aguilera
Goodbye Earl - Dixie Chicks
Without You - Dixie Chicks
Big Girls Don't Cry - Fergie
Nothing On But the Radio - Gary Allan
Stand Beside Me - Jo Dee Messina
One Step At a Time - Jordin Sparks
Until the End of Time - Justin Timberlake
Cry Me a River - Justin Timberlake
Thinking of You - Katy Perry
Because of You - Kelly Clarkson
I Need You - LeAnn Rimes
Big Deal -LeAnn Rimes
How Do I Live - LeAnn Rimes
When God-Fearin' Women Get the Blues - Martina McBride
More Like Her - Miranda Lambert
Fireflies - Owl City
Turn on the Radio - Reba (for some reason, I feel like this song was made for Carrie, but Reba got her hands on it first...which is fine cuz I love both. Still wanna know what could have been though haha)
Rehab - Rihanna
Swing Life Away - Rise Against
Underneath Your Clothes - Shakira
"Any song by" - Shania Twain (haha...couldn't pick just a few
)
If It Makes You Happy - Sheryl Crowe
A Thousand Miles - Vanessa Carlton
Ok...that's about all I can think of. Yes...I did go through my iTunes library. Don't judge haha