I put them on AV setting, which puts priority on the aperture value, and then adjusts the shutter speed accordingly
AV= 3.5
Iso= 100

It was hard because I didn't use flash so unless you have a really stable hand, the pics come out blurry... so just keep taking shots, and you will get some that come out, like I did :)

I just got this camera at Christmas and this was it's first big test for me, and I am really pleased

There was a good 20mins between pussycat dolls and christina, so what I would do is take some of the pussycat dolls, check them in the break, and then adjust your settings accordingly. What I used to test my settings before she came out were the white curtains- when those came out clear, I knew I had the right settings :)

Have fun at your concert!!!