Note, that the creatures and planeswalker have to actually die, meaning to go from the battlefield directly to the graveyard. If the don't go there, for example due to a Rest in Peace or Samurai of the Pale Curtain, then they don't die and the Celebrant doesn't trigger. Same goes for a commander that's returned to the command zone.
Put another way, does this create a bomb going of if I sacrifice 10 tokens?
Former Rules Advisor
"Everything's better with pirates." - Lodge
(The Gamers: Dorkness Rising)
"Any sufficiently analyzed magic is indistinguishable from science."
(Girl Genius - Fairy Tale Theater Break - Cinderella, end of volume 8)