Reginald: is good to see Princess Luna Back to Princess Celestia , me all pony of equestria prefer see her hightness with a smile on her face over be Drunk!  
Discord: You right, if she continue to drunk her self, she will be not long Princess Celestia but Princess Drunklestia and is will not be good for equestria, and i dont i will be reform if she be drunk!  
Reginald: For your Pun Sir Discord no thnaks you , Sir but You are Right of be not good for equestria, she will never be a good ruler and a good teacher!  
Discord: now excuse me , Fluttershy is waiting for me, Bye!  
Reginald:……sometime i wonder if is a good idea to let him free…..but Princess Luna, Thanks we got Princess Twilight, i am sure she will be a Great Princess!

@lazertomato  
I do my best.

@PonyPon  
Holy shit, that was a fast reply. You on point, buddy!

@lazertomato  
I suspect she’s neither, but immunity to poisoning implies invulnerability.

SO is celestia immortal or invulnerable, and which one does alcohol poisoning fall under?

Celestia can sleep off the hangover as long as she wants…sunrise isn’t going to come until she decides she’s ready.

@Celestia’s Servant
 
And cue the obligatory ‘I’ll tell you when I had enough!’

I think you really had enough now, my lady…