"The Dark Knight" may be the biggest and the hippest, but Sony's "Step Brothers" and Universal's "Mamma Mia" are no weekday slouchers.

"Step Brothers" did great this week after bowing to $30.9 million over the weekend. The R-rated Will Ferrell-John C. Reilly comedy raked in $4.6 million on Monday, $4 million on Tuesday and $3.6 million on Wednesday for a cume of $43.2 million.
 
That virtually mirrors "Knocked Up" numbers. That's impressive, considering all the oxygen "Dark Knight" continues to take up.

Never underestimate the appetite for laugher--or for dancing and singing.
 
Some have poo-pooed Meryl Streep topliner "Mamma Mia" as so much fluff, snickering in particular at Pierce Brosnan's performance. They're missing the point, which is, there is room for all kinds of movies, even the feel-good kind. 

This week, "Mamma Mia" continued to hold its own, seeing the slimmest declines of any pic on the top 10 chart (other than 3-D adventure "Journey to the Center of the Earth," which has the advantage of higher-priced 3-D tickets). 

On Monday, "Mamma Mia" made $2.8 million, a decline of 32%. It got better...and better. On Tuesday, it grossed $3.2 million, a decline of 28%. On Wednesday, it dipped just 26% to $3.2 million for a cume of $71.8 million. Musical's weekday numbers bested the second week of Meryl Streep hit "The Devil Wears Prada."

Take that, Batman.