dunno if this has been posted before (coz i post way too much lol)...but about a year and half ago i think, christina performed "live with me" live with Rolling Stones on their "a bigger bang tour" in new york....there is a snippet of this performance at youtube:
http://youtube.com/watch?v=-w_2MTK2qu4
in the end of the vid her voice is present, and according to ppl who was at the concert, she was great, and even says she raised the bar of the concert!
...how cool is that, rolling stones ask christina to join on their concert!
Anyway, this performance along with some other livematerial on the tour was filmed and compiled by MARTIN SCORCESE, and the concert-movie, titled "shine a light" is to be released to cinemas september 21st, and also on DVD...
itīs prolly gonna be like his classic "the last waltz" with the Band, scorcese is great!