I think the Mac should perform "World Turning", if they are going to do an "old" number. Everyone is involved and how priceless would it be to see Mick spitting and sraying his sweat all over the first row. Watch out Brittney, if you thought Madonna's kiss was nice and sloppy, you're in for a real treat!!
A new one would/should be "Thrown Down" or "Steal Your Heart Away". Makes sense to me if they want to promote the new record. Either of these songs could impress the audience if done well and
right.
Joe