The animated sequel "Ice Age: The Meltdown" registered the biggest opening of the year at the North American box office, selling an estimated $70.5 million worth of tickets during its first three days, distributor 20th Century Fox said on Sunday.

1. Ice Age: The Meltdown $70,500,000
2. Inside Man  $15,692,000
3. ATL  $12,545,000
4. Failure to Launch $6,618,000
5. V for Vendetta $6,465,000
6. Stay Alive $4,575,000
7. She's the Man $4,571,000
8. Slither  $3,676,000
9. The Shaggy Dog
$3,535,000
10. Basic Instinct 2 $3,200,000 Sharon
Stone