Image Credit: Harper Smith/NBCNBC announced today that it has renewed The Sing-Off, The Biggest Loser, and Who Do You Think You Are for the 2011-12 season. This season’s cycle of The Sing-Off averaged a 3.2 rating/8 share and 9.2 viewers, jumping versus the prior season by 28% in the adult demo and 27% in viewers. The Dec. 20 finale, in which Pop Gospel sensations Committed were crowned champions, tied as the No. 1 primetime telecast of that week in adults 18-49.

Loser has averaged a 3.1/8 in 18-49 and 9 million viewers so far this season, and remains NBC’s No. 1 entertainment series among women 18-49 and women 25-54. And season two of Who Do You Think You Are is averaging a 1.4/4 and 7 million viewers on Fridays. Upcoming episodes will feature Kim Cattrall, Gwyneth Paltrow, Lionel Richie, Ashley Judd and Steve Buscemi.

“Alternative series such as these three bona fide hits are important not only to their loyal audiences but also as strong components of the NBC schedule,” said NBC Entertainment Chairman Bob Greenblatt in a statement. “They are each unique, attention-getting shows with terrific producing and talent auspices, and we’re proud to be associated with them.”