fue genial! no podría ser mejor
How great! could be translated as: ¡Qué fantástico!
You could say Hoy lo pasé bomba, and also Hoy estuvo fantástico. The first option is probably better.
You could say "Sí, tú sabes mejor".
Culo grande is how you say great butt in Spanish.
Tatarabuela rebisabuela Bisabuela --- great grandmother
You could say "Es duro esperar". Probably it would be better to say "Es difìcil esperar", which is "it is difficult to wait".
GenialGran
buenisimo
You could say "Los chicos son extraños." Edit: a better way to say it would be "Los niños son raros"
You could say "Pues, aprendalo."
You could either say 'celebridad' or 'persona famosa.' Celebridad is better for speaking of one celebrity, but if you wanted to talk about several celebrities, you could say either celebridades or personas famosas.
You say Tia abuela.