21 held a winning hand for two weeks in a row, taking the number one spot for the second time and Nim's Island led last week's new releases by taking second. Here's how the weekend went:

1. 21
: $15.3 million
2. Nim's Island: $13.2 million
3. Leatherheads
: $12.6 million
4. Horton Hears A Who
: $9.1 million
5. The Ruins:
$8 million

Here are this week's newbies:

Prom Night
What's It All About:
Loosely based on the 1980 film of the same name which starred Jamie Lee Curtis. In this new version, a young woman named Donna and her friends are stalked by an obsessed killer on, you guessed it, prom night.
Why It Might Do Well:
The trailer shows a bunch of teenage characters consistent with what you see on the CW Network, so if that's your bag you may enjoy this.
Why It Might Not Do Well:
A PG-13 slasher film? That's like washing your feet without taking off your socks.
Number of Theaters: 2,400
Prediction: $11 million