Ivan Neville's Dumpstaphunk
Sunday April 30 at 1:35 p.m., Festival Stage

If you’re a renowned New Orleans artist and you want to write a song about the need for everyone to get along, it will probably come out funky and uplifting. But if you’re Ivan Neville, you can also pull out your address book and get a dream team of guests to perform it with you.

The song is “Hey, Hey, Hey,” which is indeed funky and uplifting. Nevi...