Michelle O wears $2700 sweater

The first closet has increasingly become a subject of interest since Michelle Obama swept fashionably into the White House in her Jason Wu ball gown.

Yesterday, Ann Romney's clothes stole the spotlight as she wore a fashionable top on Tuesday for an appearance with her husband on CBS "This Morning." Politico reported that the Reed Krakoff shirt would "cost you a pretty penny," at $990.

But Mrs. Romney will need to step up her fashion game if she wants to fill the shoes of Mrs. Obama.

In March, the first lady visited her British counterpart Samantha Cameron wearing a L’Wren Scott sweater in a trendy bright yellow hue. The embellished cardigan costs $2,720.

Obama, widely regarded as a fashion icon, likes the brand so much that she wore a peach cardigan from the same line last week during the Take Your Child to Work Day festivities.

The next day, she wore another sweater from L’Wren Scott, this one white with red trim from the Spring 2011 ready to wear collection, for a visit to Fort Stewart with the president.

She has been a fan of the brand's cardigans since at least 2010, when she wore this black and white number to a childhood obesity event.

The first lady's favorite embellished cardigans from L'Wren Scott range from $2,095 to $3,320. Plain cashmere-blend cardigans from the brand start at $910.