Lady Gaga and Anderson Cooper Go Door Knocking

A new teaser for Anderson Cooper's pre-Grammy interview with Lady Gaga has been released. In it, the pop star and Coop head to the site of Lady Gaga's first studio apartment in NYC. After sneaking into the building (Gaga pushes all the door bells on the building -- "New York style" -- until someone buzzes them in), she shares the first song she ever wrote (at the precocious age of four), "Dollar Bills":

The full interview will air Sunday night and directly after Gaga will perform her new single "Born This Way" for the first time ever on the 53rd Annual Grammy Awards.

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