Wednesday Primetime Results:

· From 8-9 p.m. ET, night two of "The Sing-Off" (1.8/5 in 18-49, 5.9 million viewers overall) grew 6% versus the second telecast of its prior cycle (1.7 on Sept. 26, 2011) and is up in total viewers by 33% (5.921 million vs. vs. 4.451 million).

· Excluding last week's "Christmas in Rockefeller Center" and "SNL Christmas," this is NBC's top 18-49 rating in the time period since Oct. 2 -- and matches NBC's highest rating in the slot, excluding last week, since Sept. 25 during premiere week. In total viewers, the 5.9 million is NBC's second biggest overall audience in the time period since Oct. 16, trailing over that span only last week's specials. From its first half-hour to its four, "The Sing-Off" grew by 12% in 18-49 rating (to a 1.9 from a 1.7)..

· "The Sing-Off" is #1 in the time period among ABC, CBS, NBC and Fox in women 18-34 (2.1 rating) and #2 among those nets in adults 18-34 (1.5).

· From 10-11 p.m. ET, "Kelly Clarkson's Cautionary Christmas Music Tale" (1.4/4 in adults 18-49, 5.3 million viewers overall) tied for #2 in the hour among ABC, CBS and NBC in adults 18-49 and adults 25-54; was #2 outright among those nets in total viewers and adults 18-34; tied for #1 in women 18-34 (with a 1.4 rating); and finished #1 outright among those nets in teens 12-17 (1.0).

· "Kelly Clarkson's Cautionary Christmas Music Tale" generated NBC's second biggest overall audience in the time period (5.3 million) since Oct. 2, trailing over that span only last week's "SNL Christmas" special (6.3 million in the hour).

· Excluding the "SNL" specials of the last two weeks, "Kelly Clarkson's Cautionary Christmas Music Tale" captured NBC's highest adult 18-49 rating in the time period since premiere week, Sept. 25.

In Late-Night Metered Markets Wednesday night:

· In Nielsen's 56 metered markets, household results were: "The Tonight Show with Jay Leno," 2.8/8; CBS's "Late Show with David Letterman," 2.7/7; and ABC's "Jimmy Kimmel Live," 2.0/5.

· In the 25 markets with Local People Meters, adult 18-49 results were: "The Tonight Show with Jay Leno," 0.9/5; "Late Show," 0.6/3; and "Jimmy Kimmel Live," 0.7/4.

· From 12:35-1:05 a.m. ET, ABC's "Nightline" averaged a 1.2/4 in metered-market households and a 0.4/3 in 18-49 in the Local People Meters.

· From 12:35-1:35 a.m. ET, "Late Night with Jimmy Fallon" (1.4/5 in metered-market households) beat CBS's "Late Late Show with Craig Ferguson" (1.3/5). In the 25 markets with Local People Meters, "Late Night" (0.6/4 in 18-49) topped "Late Late Show" (0.3/2).

· At 1:35 a.m., "Last Call with Carson Daly" averaged a 0.8/4 in metered-market households and a 0.3/3 in adults 18-49 in the 25 markets with local people meters.

NOTE: All ratings are "live plus same day" from Nielsen Media Research unless otherwise indicated.