User blog comment:DevonAndersen/Possible iCarly Episodes Without Carly?!?!?!/@comment-3101374-20110722060637

This iCarly. Carly NEEDS to be there, otherwise the show might as well be called "iSam" or "iSam and Freddie".

I think it's most likely that Miranda just didn't tweet about it. She may have forgotten, or she may have just not felt like it.