For example, it’s not likely that fans of R&B juggernaut John Legend would venture on their own into the electro-house world where Canadian duo MSTRKRFT resides.

Luckily, fans of both acts will get the chance to see how the other half lives when Legend and MSTRKRFT drop by “Late Show with David Letterman” tonight to perform their collaboration “Heartbreaker.”

The track is the second single from MSTRKRFT’s sophomore release, Fist of God.

Tuesday, June 23
Jo Koy, Christian Finnegan – “Chelsea Lately”
David Foster – “The Hour with George Stroumboulopoulos” – rerun
MSTRKRFT with John Legend – “The Late Show with David Letterman”
Elvis Costello – “The Tonight Show with Conan O’Brien”
The Brighton Port Authority (Norman Cook, Iggy Pop) – “Late Night with Jimmy Fallon”

Wednesday, June 24
Joan Rivers – “The View”
Bernadette Peters – “Live with Regis and Kelly”
Katy Perry – “The Ellen DeGeneres Show” – rerun
Femi Kuti – “The Tavis Smiley Show”
Ray Romano, St. Vincent – “Late Show with David Letterman”
Wilco – “The Tonight Show with Conan O’Brien”
The Roots – “Late Night with Jimmy Fallon”
Bettye LaVette, Todd Sawyer – “Late Late Show with Craig Ferguson”

Thursday, June 25
Darius Rucker – “The View”
Il Divo – “Live with Regis and Kelly”
Steve Martin – “The Ellen DeGeneres Show” – rerun
Mary Mary – “The Tavis Smiley Show”
Holly Williams, Bryan Callen, Chris Franjola – “Chelsea Lately” – rerun
Michael Buble – “The Hour with George Stroumboulopoulos” – rerun
Cirque du Soleil Zumanity – “The Tonight Show with Conan O’Brien”
Dinosaur Jr. – “Late Night with Jimmy Fallon”
Eric Hutchinson – “Jimmy Kimmel Live!”

Friday, June 26
Ray Romano – “Live with Regis and Kelly”
George Lopez, No Doubt – “The Ellen DeGeneres Show” – rerun
MC Hammer, John Caparulo, Sarah Colonna – “Chelsea Lately” – rerun
Bob Newhart – “The Hour with George Stroumboulopoulos” – rerun
REO Speedwagon – “The Bonnie Hunt Show” – rerun
Regina Spektor – “Late Show with David Letterman”
Snoop Dogg, Adele – “The Tonight Show with Conan O’Brien”
Grizzly Bear – “Late Night with Jimmy Fallon”
David Cross, Phoenix – “Jimmy Kimmel Live!”
Chairlift – “Late Late Show with Craig Ferguson”

Saturday, June 27
Crowded House – “Austin City Limits” – rerun
Kings of Leon – “Saturday Night Live” – rerun