1. The video to Not Myself Tonight is being re-released - some new footage is possible (but I haven't been supplied details of this) - but elements are being taken out of the clip (eg. Girl on Girl action and the ball gag in her mouth at the beginning).
2. The 2nd single is still being decided on. This is why Christina will still perform NMT at her upcoming performance. 2nd single reveal will be possibly next week, then with an upcoming performance. Woohoo or Bionic HAVE NOT been announced as the next single. Woohoo has been sent to Top 40/R radio in the US to promote the album further, since those stations weren't playing NMT.