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These two have been BFFs since... forever! Check out hotel heiress Nicky Hilton and oil heir Brandon Davis - who lit up a cig - getting in a little retail therapy on Melrose in Hollywood on Monday.

Nicky and her beau David Katzenberg attended a recent Lakers game with Kyle Richards of Real Housewives fame. So much de-lish drama with these fams!

"I knew I was taking a risk by doing the show with Kim - because we do clash and because I’m the type of person who says what I feel," Kyle tells Life & Style.