It is Catheryn Brockett http://www.catherynbrockett.homestead.com/
Nataly Dawn of Pomplamoose
Stephanie Johannesen
The blond actress in the State Farm Shopping commercial is Megan Stevenson. She is an actress and has starred in the movies, Review, Holly's Holiday, and Cavemen.
Selena Gomez from Disney Channel, then Audrina Patridge from the Hills.
Vampire Weekend---Holiday
I just looked it up and her name is Nataly Dawn. She is married to that scrawny, bald dude in the commercial with her. His name is Jack Conte and together they form the YouTube sensation called Pomplamoose.
Holiday - Vampire Weekend
Unfortunately, I couldn't find any specific information about the actress in the 2009 holiday Target commercials. Target has used different actors and actresses for their holiday commercials throughout the years, so it's possible that the actress you are referring to is not widely known.
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Vampire Weekend, the song is called "Holiday"
Melissa Woodbridge?
Pomplamoose.