boxofficemojo 'X-Men: First Class' was also overestimated overseas, coming in at $61M, ranking 3rd behind 'Pirates 4' & 'Hangover 2'
X-Men: First Class was unleashed in 74 countries and drew $61 million, which was close to
X-Men: Wolverine's openings in the same countries overall.
First Class was projected by distributor 20th Century Fox to be No. 1 in around 30 countries over the weekend, and its top-grossing ones were the United Kingdom and France. In the U.K., it made $9 million (including previews), which was off nine percent from
Wolverine, while, in France, it nabbed $7.1 million, up two percent from
Wolverine.
In most of its markets,
First Class's gross was marginally higher than
Wolverine, like in Australia ($5.1 million), or down, like in Spain and Russia, but major improvements mostly in Asia put it over the top. In South Korea,
First Class raked in $5.4 million or more than two and half times
Wolverine's start, and big gains were made in Taiwan (five times
Wolverine), Thailand, the Philippines, Singapore and Malaysia (distributor 20th Century Fox's highest-grossing opening ever). All told,
First Class posted franchise-high opening grosses in 14 countries.
http://www.boxofficemojo.com/news/?id=3180&p=.htm
So...it must be really frontloaded to drop from an estimate of 64m to 61m.
The estimates for POTC4 and HANGOVER 2 were accurate.