Anyone else detecting a theme to the weekend? Disney's Frozen has claimed the box office crown, reeling in $20.7 million. That was enough to put Paranormal Activity: The Marked Ones in the No. 2 slot with $18.2 million; The Hobbit: The Desolation of Smaug was in third. The AP notes that ticket sales were probably off because of—you guessed it—that whole "polar vortex" thing.