As with most siblings, Haylie and Hilary Duff fought a lot when they were kids.

Hilary recently told Top Of The Pops magazine: "If Haylie had friends over to stay when we were little and they left me out I’d freeze their underwear!  I’d wet the knickers, put them in the freezer and snap them to ruin them."

Did she really say ‘knickers’?  Hilary isn’t British! 

Source