Fox's "Rent" was the lowest-rated live TV musical ever on Sunday with 3.4 million viewers. That's less than the previous lowest-rated musical, "A Christmas Carol," and far below the 18.6 million viewers of 2013's "The Sound of Music." "Rent" was the latest musical to get the live-television treatment on Sunday, but viewers didn't flock to their TVs for this show like they have in the past. The show still beat out its broadcast competition on Sunday, though, in all three hours of its run time.