"One of the rare moments where she did show an interest in interaction, was a ghastly off-pitch 3 minute acapella sing-a-long where the audience got to request 2 songs they wanted to hear her sing. Also, Madonna surprisingly failed to acknowledge or even introduce her dancers and backing band at all - putting herself and her guitar front and center. Of course, there was no encore which is perhaps criminal considering the money fans paid to see the show."
Read Will's entire review here.