NBC's 'Rock Center with Brian Williams' fourth-place

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From 8-10 p.m. ET, “The Sing-Off” delivered a 1.4 rating, 3 share in adults 18-49 and 4.3 million viewers overall in a competitive time period that included CBS’s “Two and a Half Men,” “How I Met Your Mother,” “Two Broke Girls” and “Mike & Molly,” ABC’s “Dancing With the Stars” and debut of “You Deserve It” and Fox’s “Terra Nova” and “House.” 


From its first half-hour to its fourth, “The Sing-Off” grew by 15 percent in 18-49 rating (to a 1.5 from a 1.3).  Note that on average this season, “The Sing-Off” has been adding 20 percent to its next-day “live plus same day” 18-49 rating when Nielsen reports additional time-shifted viewing in “live plus seven day” ratings.
 
At 10 p.m. ET, “Rock Center” averaged a 0.9/2 in 18-49 and 3.6 million viewers overall.

(source; NBC)