Are jeans, tee-shirt and sneakers okay for a pop concert?

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It's been a very, very long time since I went to a concert, but I'm going on the 15th to see Engelbert at MGM Grand @Foxwoods. I've got to hang around most of the day, though, and I don't really want to have to dress up or anything. But is casual dress okay? I know we've become fairly lax in our dress code overall, but since it's at MGM Grand, I just wanted to make sure.

I wasn't a huge fan when I was younger--I was SO into Paul Revere and the Raiders, especially Mark Lindsay--so I never collected any of his albums. Nowadays, I've been catching up with his work, and enjoying it thoroughly. A friend and I did go to see Mark Lindsay many years ago, and now I have him as a friend at FB. The universe often moves in mysterious ways!