There are actual statistics confirming the wattage of Oprah's Midas mention - anything she utters sees something like a trillion-percent sales increase. So when President Obama appeared with the other O for the White House Christmas Special and dropped a com about the First Lady's Garavelli Brooch, he spurred a similar phenomenon for the jeweler.
Oh, how we love those Obamas. Put them in a room with Oprah, and, well, we get into a strangely zealous buying mood too. So when the President countered his wife's claim that she was responsible for their family's gift-buying by reminding her of the custom Garavelli brooch she was actually wearing at the time, the lines at the jeweler lit up. Turns out, Mr. O purchased the bauble at a Chicago jewelry shop that, inexplicably opted to remain anonymous.
Merry Christmas, Garavelli - it pays to outfit the First Lady when she's doing Oprah, apparently.