First Lady Michelle Obama gives the thumbs-up upon the arrival of the White House Christmas tree, flanked by her daughters Malia (C) and Sasha (2nd R) and dog Bo, in Washington on November 23, 2012. (AFP PHOTO/NICHOLAS KAMM/AFP/Getty Images)

First Lady Michelle Obama (R) and her daughters Malia (C) and Sasha (L) arrive with dog Bo to receive the White House Christmas tree in Washington on November 23, 2012. (NICHOLAS KAMM/AFP/Getty Images)

First lady Michelle Obama (L) talks with the growers of the official White House Christmas Tree, Rusty Estes (2nd R) and Beau Estes (R), on November 23, 2012 in Washington, DC. The tree is a 19-foot Fraser Fir from Peak Farms in North Carolina. (Photo by Brendan Hoffman/Getty Images)

The official White House Christmas Tree is delivered to the White House on November 23, 2012 in Washington, DC. The tree is a 19-foot Fraser Fir from Peak Farms in North Carolina, which is owned by Rusty and Beau Estes. (Photo by Brendan Hoffman/Getty Images)

The official White House Christmas Tree is delivered to the White House on November 23, 2012 in Washington, DC. The tree is a 19-foot Fraser Fir from Peak Farms in North Carolina, which is owned by Rusty and Beau Estes. (Photo by Brendan Hoffman/Getty Images)

First lady Michelle Obama (R) and her daughter Malia Obama (2nd L) are presented with the official White House Christmas Tree on November 23, 2012 in Washington, DC. The tree is a 19-foot Fraser Fir from Peak Farms in North Carolina, which is owned by Rusty and Beau Estes. (Photo by Brendan Hoffman/Getty Images)

First Lady Michelle Obama (C), joined by her daughters Malia Obama (L) and Sasha Obama, is presented with the official White House Christmas Tree on November 23, 2012 in Washington, DC. The tree is a 19-foot Fraser Fir from Peak Farms in North Carolina, which is owned by Rusty and Beau Estes. (Photo by Brendan Hoffman/Getty Images)

First lady Michelle Obama (2nd R) and her daughters Malia Obama (C) and Sasha Obama (3rd R) are presented with the official White House Christmas Tree on November 23, 2012 in Washington, DC. The tree is a 19-foot Fraser Fir from Peak Farms in North Carolina, which is owned by Rusty and Beau Estes. (Photo by Brendan Hoffman/Getty Images)

First lady Michelle Obama leans down to smell the official White House Christmas Tree after it was delivered to the White House, as her daughters Malia Obama (R) and Sasha Obama look on, on November 23, 2012 in Washington, DC. The tree is a 19-foot Fraser Fir from Peak Farms in North Carolina, which is owned by Rusty and Beau Estes. (Photo by Brendan Hoffman/Getty Images)

First lady Michelle Obama with daughters Sasha, behind the first lady, and Malia, left, and family dog “Bo” flashes a thumbs up as they welcome the arrival of the official White House Christmas tree, a 19-foot Fraser Fir from Jefferson, N.C., Friday, Nov. 23, 2012, at the North Portico of the White House in Washington. (AP Photo/Manuel Balce Ceneta)