'Mamma' dethrones 'Knight' on sales chart

'Mummy' sequel wraps up No. 1 on rental chart

Universal Studios Home Entertainment scored big on the national home video charts the week ending Dec. 21, with a pair of releases topping both the sales and the rental charts their first week in stores.

"Mamma Mia!" bowed at No. 1 on the Nielsen VideoScan First Alert sales chart and earns the distinction of displacing Warner's "The Dark Knight" as the top-selling DVD in the country. "Dark Knight" remains the top-selling video release of the year, with an estimated worldwide total of 13.5 million units sold its first week out, 1.7 million of them on the nascent Blu-ray Disc format.

For the week, however, "Mamma Mia!" outsold the Batman sequel, which did about 85% as much business its sophomore week as the musical comedy built around ABBA's hits, which earned $143.7 million in theaters.

Meanwhile, Home Media Magazine's rental chart for the week was topped by another new Universal Studios release, the actioner "The Mummy: Tomb of the Dragon Emperor," which also bumped "The Dark Knight" to the second-place spot. "Dark Knight" still managed to generate 93% as much rental action as "The Mummy," while "Mamma Mia!" debuted at No. 3 with 80% as much rental activity.

On the Nielsen VideoScan Blu-ray Disc chart, "Dark Knight" remained the No. 1 seller for the second week. "The Mummy" debuted at No. 2, but generated only 30% as much sales activity on the high-definition format as "Dark Knight." Running a close third was "Mamma Mia!" with 28% of "Dark Knight" sales.