This is the 6554th most frequent Spanish word.
cantará
"She/he/it will sing" (future tense of "cantar").
The word 'cantará' here is a future indicative form of the verb 'cantar,' indicating an action that will take place in the future.
Mañana ella cantará en el concierto.
Tomorrow she will sing at the concert.
In this question, the word 'cantará' is used in the third person singular future tense to inquire about a future action.
¿Quién crees que cantará la próxima canción?
Who do you think will sing the next song?
This usage of 'cantará' indicates a possibility or speculation about a future action in a conditional context.