How do you say the phrase may you live a hundred years in Italian?

Che tu possa vivere cent'anni! or Possa tu vivere cent'anni! in the singular, Che voi possiate vivere cent'anni! or Possiate vivere cent'anni! in the plural and Cent'anni! are Italian equivalents of the English phrase "May you live to be 100!" Birthplace, context and personal preference determine whether one "you" (cases 1, 2, 5) or two or more "you all" (examples 3, 4, 5) suits for what translates literally as "That you may live 100 years!" (instances, 1, 3), "May you live 100 years" (options 2, 4) and "100 years!" (sample 5). The respective pronunciations will be "key too POS-sa VEE-vey-rey tchen-TAN-nee" or "POS-sa too VEE-vey-rey tchen-TAN-nee" in the singular, "Key voy pos-SYA-tey VEE-vey-rey tchen-TAN-nee" or "pos-SYA-tey VEE-vey-rey tchen-TAN-nee" and "tchen-TAN-nee" in Pisan Italian.