Tune in to Letterman tonight to get the scoop on the newest “American Idol” judge, Kara DioGuardi.

Check out some music you might not have heard before from folks like Brett Dennen, Crooked X, Delta Spirit, 3OH!3 or Glasvegas.

What do some TV stars do when they’re not in front of the camera? Sing of course. Charity supergroup Band From TV, which includes Greg Grunberg (“Heroes”), James Denton and Teri Hatcher (“Desperate Houswives”), Hugh Laurie and Jesse Spencer (“House”) and “Bachelor” No. 1 Bob Guiney, will perform Friday on Leno.

And if all of that isn’t distraction enough, this week also sees the return of new episodes of “Austin City Limits” with a performance by Foo Fighters.

Monday, January 12
The Groovaloos – “The Ellen DeGeneres Show”
Brad Wollack, John Caparulo – “Chelsea Lately”
Kara DioGuardi – “Late Show with David Letterman”
All-American Rejects – “The Tonight Show with Jay Leno”
Eric Hutchinson – “Late Night with Conan O’Brien”
The Fray – “Jimmy Kimmel Live!” – rerun
Anthony Green – “Last Call with Carson Daly”

Tuesday, January 13
Randy Jackson – “The Ellen DeGeneres Show”
Chris Franjola, Gary Valentine – “Chelsea Lately”
Smashing Pumpkins – “The Hour with George Stroumboulopoulos”
John Legend – “The Tonight Show with Jay Leno”
Susan Tedeschi – “Late Show with Conan O’Brien”
David Cook – “Jimmy Kimmel Live!”
Tom Freund with Ben Harper – “Last Call with Carson Daly”

Wednesday, January 14
Richard Lewis, Richard Belzer – “The View”
Seal – “The Ellen DeGeneres Show”
TJ Miller, Greg Giraldo – “Chelsea Lately”
Randy Rogers Band – “Late Show with David Letterman”
Brett Dennen – “The Tonight Show with Jay Leno”
Patty Loveless – “Late Night with Conan O’Brien”
Morgan Murphy – “Jimmy Kimmel Live!”
Flobots – “Last Call with Carson Daly”

Thursday, January 15
Live – “The Ellen DeGeneres Show”
Heather McDonald, Sarah Colonna – “Chelsea Lately” – rerun
Kevin James, Mute Math – “The Tonight Show with Jay Leno”
Fred Armisen, Robert Schimmel – “Late Night with Conan O’Brien”
Crooked X – “Jimmy Kimmel Live!”
Wanda Sykes, Glasvegas – “Late Late Show with Craig Ferguson”
Puddle of Mudd – “Last Call with Carson Daly”

Friday, January 16
All-American Rejects – “The Ellen DeGeneres Show”
Lionel Richie – “The Tavis Smiley Show”
Johnny Sanchez, Arden Myrin, Greg Proops – “Chelsea Lately”
Gene Simmons – “The Hour with George Stroumboulopoulos”
The Airborne Toxic Event – “Late Show with David Letterman”
Band From TV – “The Tonight Show with Jay Leno”
Amos Lee – “Late Night with Conan O’Brien” – rerun
Kevin James, Delta Spirit – “Jimmy Kimmel Live!”
Kevin James, 3OH!3 – “Last Call with Carson Daly” – rerun

Saturday, January 17
Foo Fighters – “Austin City Limits”
Fleet Foxes – “Saturday Night Live”