See also: Weekly Blu-ray Sales Chart - Weekly DVD and Blu-ray Sales Combined Chart - DEG Watched at Home Top 20 - Netflix Daily Top 10

United States DVD Sales Chart for Week Ending December 21, 2008

  TitleUnits
this
Week
%
Change
Total
Units
Spending
this
Week
Total
Spending
Weeks
1 new Mamma Mia! 3,332,519   3,332,519  $68,381,624  $68,381,624 1
2 (1) The Dark Knight 2,554,255 -63% 9,398,305  $43,641,235  $165,210,042 2
3 new The Mummy: Tomb of the Dragon Emperor 1,402,750   1,402,750  $22,992,335  $22,992,335 1
4 (2) Horton Hears a Who! 1,065,946 -39% 2,814,766  $18,200,282  $48,071,352 2
5 (6) WALL-E 621,259 +26% 6,908,051  $9,622,059  $109,286,717 5
6 (7) Kung Fu Panda 575,193 +21% 7,078,426  $8,622,143  $108,921,134 7
7 (3) The Chronicles of Narnia: Prince Caspian 548,055 -40% 3,967,406  $8,745,040  $63,167,171 3
8 (9) Hancock 517,286 +39% 4,213,929  $8,731,995  $72,617,588 4
9 (5) Step Brothers 416,393 -23% 2,274,207  $7,396,889  $39,961,126 3
10 (4) Wanted 371,043 -46% 2,980,329  $6,187,068  $50,328,272 3
11 (10) Iron Man 331,156 +31% 8,080,123  $5,552,526  $146,102,245 12
12 (12) Indiana Jones and the Kingdom of the Crystal Skull 243,995 +22% 5,118,407  $4,120,539  $100,216,755 10
13 (11) Tropic Thunder 237,743 +19% 2,268,701  $3,769,154  $38,636,000 5
14 (14) Tinker Bell 234,276 +40% 3,249,200  $3,628,935  $50,655,790 8
15 new Traitor 194,111   194,111  $3,020,367  $3,020,367 1
16 (8) Lost: The Complete Fourth Season 193,424 -59% 667,465  $7,154,754  $24,689,531 2
17 (25) Hellboy 2: The Golden Army 178,650 +49% 2,120,841  $3,465,613  $39,281,323 6
18 (24) A Christmas Story 166,626 +38% 1,282,328  $1,722,979  $17,368,024 430
19 (16) Sex and the City - The Movie 166,557 +12% 3,405,731  $3,114,100  $69,667,713 13
20 (-) Little Mermaid - Ariel's Beginning, The 161,473 +1,056% 2,215,045  $2,581,953  $37,793,289 17
21 (18) Fred Claus 158,037 +7% 1,434,449  $2,368,975  $24,134,969 4
22 new The House Bunny 152,540   152,540  $2,591,655  $2,591,655 1
23 (22) Jeff Dunham's Very Special Christmas Special 149,448 +18% 661,280  $1,343,538  $6,007,630 5
24 (23) The Incredible Hulk 147,730 +21% 3,270,897  $2,461,610  $55,688,015 9
25 (26) Get Smart 138,851 +22% 1,763,856  $2,181,002  $29,715,696 7
26 (-) Planet Earth - The Complete BBC Series 129,178 +4,395% 3,216,020  $7,749,388  $179,209,296 87
27 (20) Batman Begins 124,712 -9% 3,773,606  $996,449  $43,039,653 166
28 (13) The X-Files: I Want to Believe 116,463 -34% 583,520  $2,378,850  $12,113,532 3
29 (15) Sisterhood of the Traveling Pants 2 109,555 -30% 818,029  $1,670,692  $12,727,935 5
30 (17) Star Wars: The Clone Wars 108,831 -27% 1,183,573  $1,764,782  $20,570,953 6

Our DVD and Blu-ray sales estimates are based on weekly retail surveys, which we use to build a weekly market share estimate for each title we are tracking. The market share is converted into a weekly sales estimate based on industry reports on the overall size of the market, including reports published in Media Play News.

For example, if our weekly retail survey estimates that a particular title sold 1% of all units that week, and the industry reports sales of 1,500,000 units in total, we will estimate 15,000 units were sold of that title. The consumer spending estimate is based on the average sales price for the title in the retailers we survey.

We refine our estimates from week to week as more data becomes available. In particular, we adjust weekly sales figures for the quarter once the total market estimates are published by the Digital Entertainment Group. Figures will therefore fluctuate each week, and totals for individual titles can go up or down as we update our estimates.

Because sales figures are estimated based on sampling, they will be more accurate for higher-selling titles.