Michelle ObamaDALLAS, Mar 18, 2010 / FW/ — Between being Irish for a day, attending premieres or simply just going out and about, this week is turning out to be a photographer’s field day for celebrity sightings.

Yesterday at the White House, First Lady Michelle Obama wore a Jason Wu custom Kelly green faille sheath with embroidered French knots to the St. Patrick’s Day reception in the East Room.

In New York, Kristen Stewart of the Twilight saga fame attended the premiere of her new movie “The Runaways” wearing an Emilio Pucci dress from the Spring 2010 collection.

Alan Cumming, who is adding a new dimension the new CBS hit series “The Good Wife” was spotted at the GLAAD Awards sporting the perfect blue suit by G-Star. Who else could make blue look this cool?

In Los Angeles, Madonna arrived at the CAA Pre-Oscar party wearing a Solange Azagury-Partridge Mercury tiara. Who else but the Material Girl can pull this look easily?

Still in Los Angeles, but this time just going about town, Ashley Tisdale was spotted wearing Genetic Denim’s “The James” Recessive Zipper Skinny Jeans.

In Miami, sisters Kim and Kourtney are loving their matching SAM EDELMAN sandals! Kim wore her shoes while shopping in Miami on March 15th and Kourtney wore her’s while grabbing coffee in Miami last week! Both girls are wearing the GIGI sandal in leopard, which retails for $50. Don’t they look fab?!