A lot of our readers keep asking us, "Please don't post spoilers on the home page. I haven't been to my first show yet," so we try not to get too specific when talking about what happened at any given U2 concert. Little bit difficult tonight, but how about if we put it like this: You know that new song that (almost) all of you have been wanting U2 to finally play in concert for the first time, and that Bono promised earlier in the tour would be played before the tour wrapped up? Well, they played it Monday night in Chicago.

If you don't mind spoilers, you can find out what it was by checking the Chicago 4 set list on our Tours site, and that's also where you can post your show review and photos if you were there.

Next up: a couple days off followed by Chicago 5 on Thursday.

UPDATE: Thanks to Gregorio Pulido, here's video of that song I was talking about above.