Teenage daughter washing has defeated me

I was so proud of myself- 3 loads of her washing done over the weekend I think i have this beaten her backlog. Tonight she takes them to her room to put away; I go in to tuck her in and notice 2 baskets still full and stacked; I say 'That's not putting it away' , she replies 'Oh that's the new dirty' seriously... How can one teen have that much clothes...

Ps. My other child has 1/3 the clothes.