I'm pretty sure these are the chords for You Lost Me from Christina's album
Bionic. She performed this at the American Idol Finale.
If you have any questions, message me on YouTube: www.youtube.com/natman2005.

Am (x02210@1)        EmI (022000@1)am done, smoking gun
      F (133211@1)              C (x32010@1)            EWe've (022100@1)lost it all, the love is gone
Am (x02210@1)          EmShe (022000@1)has won. Now it's no fun
      F (133211@1)              CWe've (x32010@1)lost it all, the love is gone

CAnd (x32010@1)we had magic
GAnd (320003@1)this is tragic
Eaug (03211x@1)                      FYou (133211@1)couldn't keep your hands to yourself

Chorus:
C (x32010@1)     E (022100@1)                F (133211@1)          Fm (133111@1)         
I feel like our world's been infected
C (x32010@1)     E (022100@1)             F (133211@1)        FmAnd (133111@1)somehow you left me neglected
C (x32010@1)     E (022100@1)          F (133211@1)           FmWe (133111@1)found our life's been changed
F (133211@1) Fm (133111@1)CBabe, (x32010@1)you lost me

Am (x02210@1)          EmAnd (022000@1)we tried, oh how we cried
F (133211@1)                 C (x32010@1)               EWe (022100@1)lost ourselves, the love has died
Am (x02210@1)              EmAnd (022000@1)oh, we tried, you can't deny
F (133211@1)                      C (x32010@1)           
We're left as shells, we lost the fight

CAnd (x32010@1)we had magic
GAnd (320003@1)this is tragic
Eaug (03211x@1)                  FYou (133211@1)couldn't keep your hands to yourself

Chorus:
C (x32010@1)     E (022100@1)                F (133211@1)          Fm (133111@1)         
I feel like our world's been infected
C (x32010@1)     E (022100@1)             F (133211@1)        FmAnd (133111@1)somehow you left me neglected
C (x32010@1)     E (022100@1)          F (133211@1)           FmWe (133111@1)found our life's been changed
F (133211@1) Fm (133111@1)CBabe, (x32010@1)you lost me

Am (x02210@1)            D (xx0232@1)                 AmNow (x02210@1)I know you're sorry and we were sweet
              D (xx0232@1)                   GBut (320003@1)you chose lust when you deceived me
             Eaug (03211x@1)            FYou'll (133211@1)regret it but it's too late
                               CHow (x32010@1)can I ever trust you again?

Chorus:
C (x32010@1)     E (022100@1)                F (133211@1)          Fm (133111@1)         
I feel like our world's been infected
C (x32010@1)     E (022100@1)             F (133211@1)        FmAnd (133111@1)somehow you left me neglected
C (x32010@1)     E (022100@1)          F (133211@1)           FmWe (133111@1)found our life's been changed
F (133211@1) Fm (133111@1)CBabe, (x32010@1)you lost me

Enjoy!