James Cameron certainly isn’t feeling blue. The Avatar director’s sci-fi blockbuster already sank his 1997 classic, Titanic, to take the title of highest grossing movie of all time — and the film, featuring cobalt-colored aliens, certainly doesn’t seem to be slowing down. On the weekend of January 30, Avatar topped the box office for the seventh week in a row, with domestic ticket sales of $30 million. Worldwide, the hit has earned more than $2 billion.