Katherine Heigl to hit 'Letterman,' Adam Sandler doing 'Conan'

Heigl's hanging with Letterman and Sandler's visiting Conan tonight, but Fallon's got a really solid show with GOB Bluth and E's girl Sloane stopping by...

"The Late Show with David Letterman": Katherine Heigl, Jeff Altman, Spinnerette

"The Tonight Show with Conan O'Brien": Adam Sandler, Peter Sarsgaard, Kate Voegele

"Late Late Show with Craig Ferguson": Margaret Cho, Michael Lewis, Eric Church

"Late Night with Jimmy Fallon": Will Arnett, Emmanuelle Chriqui, Tom Jones

"Last Call with Carson Daly": Jack & Kelly Osbourne, Ben Harper & Relentless7 (repeat)

"The Daily Show with Jon Stewart": Brian Williams

"The Colbert Report": Bob Park

"Jimmy Kimmel Live": David Arquette, Jill Wagner, Linkin Park (repeat)

"The View": Charles Gibson

"Live with Regis and Kelly": C.C. Sabathia, Alex Rodriguez, Mark Teixeira, Alanis Morissette

"The Ellen DeGeneres Show": Halle Berry, Flo Rida (repeat)

"Tavis Smiley": Prince (repeat

"Chelsea Lately": Michael Vartan, John Caparulo, Sarah Colonna, Ken Baker

"The Hour with George Stroumboulopoulos": Erin Brockovich, David Byrne, Tony Robbins (repeat)

"The Bonnie Hunt Show": Cloris Leachman, 8-year-old guitar prodigy Tallan Latz, chef Jesse Brune (repeat)