Well, it seens like some nice people over internet edited the oficial Femme Fatale DVD video and put a remastered version of the fanrecordings on the sound... The final result? Proper camera angles + live vocals!
I will put the ones I find:
It seens like some of the live vocals are actually in the DVD, and can be found if u change the audio during some performances... Still... sadly not all live performances are avaliable on youtube... but as far as it goes, the only songs I couldn't hear live vocals were Piece of Me, S&M, I'm a Slave 4 U, Womanizer and Till The World Ends. Also important to note that she sang most of the songs over a backtrack, and a good amount of the choruses were lip-synched^^