Something is different here...

Ah, I see. Mia Serafino on the set of iCarly. She was with Miranda Cosgrove in Crowded, not iCarly(*). And they remained great friends ever since, which is why it is completely familiar to see those two together. (*I have no idea what happened in the reboot, since it doesn't broadcast here)

From Miranda's Instagram. #MirandaCosgrove #MiaSerafino #iCarly