James Cameron's juggernaut Avatar sold $27 million in movie tickets Friday, the first full day the 3-D science fiction adventure film was in theaters. One analyst predicted the movie might rake in $80 million by the end of the weekend. Will Smith's I Am Legend holds the record for the biggest December weekend release with $77.2 million. Entertainment Weekly reports that Avatar was pretty much the only movie people watched Friday: No other film made more than $3.4 million. Costing Twentieth Century Fox $230 million, Avatar was one the most expensive films of all time.