Specialty = Murano
Celebrity's motto is Relaxed Luxury, you often need to make your own entertainment in the day time on a sea day or read a lot or just get drunk by the pool. At best you'll have a 45min lecturer that day.. Every night they'll be a 7pm main show that's repeated at 9pm, one night the main show will be a comedian, one night a magician and the rest are musicals. I have been on X sailings without a comedian or without a magician but that is rare. With X's production shows (musicals), they'll have the exact same shows (Rock City, Broken Strings, etc) fleet wide on each sailing. Also every night at 8pm the Activities Director will do a passenger participation show. This is a bit different than Carnival as they have (and we love) that they offer the multiple comedians and multiple comedy shows per day, the sing along piano bar, karaoke, the house band playing in the atrium and this is all in addition to the main show
Overall if you're okay with the relax part (many bring their own board games and cards) you'll have a great time
Bonus tip, if you want to eat LUNCH at the buffet around the time it opens, get there 10mins before they open to grab a table. Many buffet stations will just start to open so you may be able to get food before the masses arrive