Knock knock!!! Who's there? Penelope Disick, THAT'S who! The darling diva sported some serious doorknocker earrings during an outing with mom Kourtney Kardashian on Saturday, as the pair headed to Fred Segal for some shopping.

The two fashion plates wore dresses for the shopping trip -- Pene, a pastel summer look and Kourt, a black silk sheath with combat boots (isn't it a little hot for boots?!).

Disick has fashion in her genes -- dad Scott is a hypebeast and (the) Lord knows, the family has enough $$$ to spend on their looks. Still, shouldn't the six-year-old be wearing tiny studs instead of huge hoops?!