Los Angeles  - Last weekend's top-grossing movie, the romantic comedy Four Christmases, had 18.2 million dollars in ticket sales under its tree in its second three-day weekend in cinemas.

The number was good enough to hold onto the North American box- office revenue title for the Friday-Sunday period.

The movie stars Vince Vaughn and Reese Witherspoon as a couple trying to avoid their dysfunctional families at the holidays. When their getaway flight is cancelled, they have to spend time separately with each of their four parents, who are divorced. (dpa)