I dig the way Elis is sometimes sitting "in" the time (in JSngry's first video, when she is nodding her head in time), and sometimes a little ahead of the time. It adds an interesting energy to the phrasing for me. I noticed the same thing in the Astrud Gilberto video of "Ipanema" that was discussed recently. Astrud would push the time on the last part of the bridge. Cool!
That phrasing a little ahead of the time thing is also one of the things I find attractive about Anita O'Day's singing. So often, vocalists are lagging behind the beat, stretching phrases, that when singers like Elis, Astrud and Anita go against the grain, it's really striking.
Thanks all for posting the above videos!