Altough there's the whole orchestra there, plus Tokyo Jihen members, it seems to me that with the exception of her voice, everything else is playback. I'm not a great fan of this song, but the vocals are amazing and the stage has this huge feel similar to what we find in the PV. Altough I was expecting her to use the same wig.
Opinions aside, here is the interview plus performance.
01 - カーネーション (Carnation)
Download (MP3 V0)
Download (MP4 H264 1280x720)