Many, many choices. It depends on how much you wish to spend (OysterRock’s comment), what features/functions you need, and exactly what you mean by ‘something for performances’.
As far as features/functions go, many amps have more than one input. You may want multiple ins for other keyboards, and maybe a mic input as well. Then there’s the consideration of some type of equalization - from nothing at all, to simple tone controls, to parameter/graphic EQ. Some amps also have built-in effects, which might be a valuable addition for a no-effects keyboard like the LP.
As for ‘performances’, the size of the amp you’ll need depends on where you’ll play, and the type of music you’ll be playing. For a smallish coffee-house setting, a small amp could be fine. For a church or large room you might need something bigger. If you play in a band, you might want a more powerful amp so that you can be heard above the other instruments.
Keyboard amps or PA powered speakers are probably you’re best choice, as they will do a better job at accurate sound reproduction than a bass or guitar amp. Keyboard amps are made by Roland, Alesis, Hartke, Peavey, Groove Tubes, Barbetta, and others. Your local music store will probably carry at least a few of these. Try to audition as many different types as you can.
Powered PA speakers are another way to go. You’ll find offerings from Mackie, Yamaha, Samson, JBL, and a number of others.
When judging an amp or PA, consider the size and weight as well, as you’ll probably be the one who has to transport, carry and setup the amp. Also be sure to evaluate prospective models for smooth rolling casters/wheels and built-in handles (a few keyboard amps have retractable telescoping handles).