Ludacris-2014-Billboard-Music-Awards-Show-Z2XO-g0pNSglChrissy Teigen and Ludacris host The 2015 Billboard Music Awards (ABC, 8 p.m.) from the MGM Grand Las Vegas. It’s the only awards show where no winners are a surprise: They’re simply the ones who sold the most in each category. Still, there are a lot of performances, from Mariah Carey, Van Halen, Britney Spears with Iggy Azalea, as well as the debut of Taylor Swift’s new music video and Simple Minds and Molly Ringwald doing a 30 year tribute to “The Breakfast Club.” Also: two from “Empire” do a medley of that show’s songs.

Colorizing continues on the reprise of one of the oldest TV sitcoms. On the “I Love Lucy Superstar Special” (CBS, 8 p.m.), two ancient episodes get a new gleam, when William Holden meets Lucy in one segment and TV’s “Superman” George Reeves flies into the other. Baffle your kids with this prime time entertainment.

The actress continues her fanciful study into animal reproduction and stage costuming in “Isabella Rossellini’s Green Porno” (Ovation, 8 p.m.), a chronicle of her live show that grew out of her odd short films, and takes her around the world. Especially enlightening are her field trips to see creatures in faraway lands.

Here’s what we need, going into the political season: another panel discussion debate show. Imran Garda hosts “Third Rail” (Al Jazeera America, 6 p.m.) which will begin by discussing the role of religion on global conflicts with Alan Dershowitz and Tavis Smiley.

Arya begins her training on “Game of Thrones” (HBO, 9 p.m.).

Of two Vince Gilligan-penned projects on TV this year, one was a hit (“Better Call Saul”) and the other fades away after burning off its two final episodes, “Battle Creek” (CBS, 9 and 10 p.m.).

Hugh Laurie has been a great addition to “Veep” (HBO, 10:30 p.m.) as a last minute vice presidential pick that may well overshadow Selina.

Pied Piper agrees to live stream a stunt in order to upstage Hooli on “Silicon Valley” (HBO, 10 p.m.) but it only dredges up old college alliances from Erlich.

Vanessa begins to harness her new powers on “Penny Dreadful” (Showtime, 10 p.m.).

Zoe stages a walk-out on “Nurse Jackie” (HBO, 9 p.m.).

What does Coca-Cola have to do with Nazis? Bradley Whitford’s Jonathan finds a connection on a new “Happyish” (Showtime, 9:30 p.m.).

After all of the declarations of last week’s up fronts, the fate is still not known for “A.D. The Bible Continues” (NBC, 9 p.m.) (despite its name), and “American Odyssey” (NBC, 10 p.m.).

Finales (and the last time we hear Harry Shearer?) comes for “The Simpsons” (Fox, 8 p.m.), alongside season ends for “Brooklyn Nine-Nine” (Fox, 8:30 p.m.), “Family Guy” (Fox, 9 p.m.) and “Bob’s Burgers” (Fox, 9:30 p.m.), all of which return in the fall.

“Cabaret” (TCM, 8 p.m.) plays alongside one of its inspirations, “The Blue Angel” (TCM, 10:15 p.m.). Then a four-pack of Laurel and Hardy shorts starting with “Do Detectives Think?” (TCM, 12:15 a.m.), followed by “You’re Darn Tootin,'” “Double Whoopee” and Big Business.”

In an NBA western conference game 7, it’s Clippers at Houston (ABC, 3:30 p.m.).

The Stanley Cup western conference finals begin with Chicago at Anaheim (NBC, 3 p.m.).

Baseball includes Yankees at Kansas City (MLB, 2 p.m.) and Detroit at St. Louis (ESPN, 8 p.m.).

Late Talk

ABC: Sens. Mitch McConnell and Dianne Feinstein, National Transportation Safety Board member Robert Sumwalt, former deputy CIA director Michael Morrell. CBS: Sumwalt, Gov. Scott Walker, Rep. Devin Nunes, Sen Bob Casey, former Defense Secretary Robert Gates. NBC: Sumwalt, Sens. Cory Booker and Rand Paul. CNN: Sumwalt, Sen. Bernie Sanders, Reps. Paul Ryan and Bill Shuster. Fox News: Sumwalt, Sen. Marco Rubio, D.C. mayor Muriel Bowser.