Currently no nighttime shows in the parks (they closed at 7 this weekend, barely dusk), except the Mardi Gras parade/concert at the Studios on Saturday nights, which will still be going on Easter weekend, not sure who is playing. (It's free with daily admission to the park.)
They do have an hourly show in Citiwalk, starting at 5 or 6 p.m. Various street performers -- a magician, a mime (no, really, he's entertaining), a fiddler, some extreme sport performers. Definitely worth catching at least once.
Hope this helps.