Young people scamper off to Hollywood to make it big? It’s the familiar premise to a new series imported from Canada, “The L.A. Complex” (The CW, 9 p.m.) starting tonight.

It’s “Melrose Place” with newer music, updated phones and no stars. Except for some surprising (and so welcomed) Paul F. Tompkins and Mary Lynn Rajskub There are auditions and rejections and hope. But it’s all done in a way that makes “Smash” look like “The Sopranos.”

The CW seems immune to audiences; it will stick with a series it puts on the air even if nobody watches. But on “90210” (The CW, 8 p.m.) there’s a party.

It wouldn’t be good form to send home a Motown star on “Dancing with the Stars” (ABC, 9 p.m.) during Motown Week, but Gladys Knight had the lowest vote total Monday and the oldest competitor of the season has to say goodbye sometime.

Keep your diamond jubilee for the Queen. Today is Barbra Streisand’s 70th birthday. You don’t have to buy a gift but you can watch some of her films on Turner Classic Movies: “The Way We Were” (8 p.m.), “Funny Girl” (10:15 p.m.), “The Prince of Tides” (1 a.m.), “The Owl and the Pussycat” (3:30 a.m.). and “Funny Lady” (5:15 a.m.).

Whitney Houston, meanwhile, has her hits sung on tonight’s “Glee” (Fox, 8 p.m.).

A four-hour look into the attempt to fix the economy after the 2008 meltdown begins on “Frontline” (PBS, 9 p.m., check local listings) with its first part looking at how new ways of selling risks may have led to the decline. Martin Smith and Martin Kirk report; it concludes next Tuesday.

Eliminated contestants on “The Biggest Loser” (NBC, 8 p.m.) return to vie for a spot in the final.

“Breaking In” did so poorly last time it was on, Fox has decided not to bring it back tonight as planned. Instead, they’ll follow a new episode of “New Girl” (Fox, 9 p.m.) with a rerun of “New Girl.”

Results come in from the Presidential Primaries (CNN, MSNBC, Fox News, 8 p.m.) held today in Pennsylvania, New York, Connecticut, Delaware and Rhode Island

To accept the premise of “Celebrities at Home” (HGTV, 8 p.m.), returning for its second season, one must furst define celebrity, since the first homes visited are of Jillian Barberie Reynolds, Tia Carrere and Deidre Hall.

The Rancics, known to you as “Giuliana & Bill” (Style, 8 p.m.) have been through so much, from a double mastectomy to birth issues, they’ve found that putting it all on TV must help.

Struggles continue, too, on “Deadliest Catch” (Discovery, 9 p.m.).

Cute name for new landscaping challenge show: “Yardcore” (DIY, 9 p.m.).

Selena Gomez is featured in both “Another Cinderella Story” (Disney, 8:30 p.m.) and “Monte Carlo” (HBO2, 8 p.m.).

It’s Heat at Celtics (TNT, 8 p.m.) and Suns at Jazz (TNT, 10:30 p.m.) in NBA action.

In the Stanley Cup playoffs, it’s Panthers at Devils (NBC Sports Network, 7:30 p.m.).

Daytime Talk
Kelly Ripa: Hugh Grant, Blair Underwood, Jesse Palmer. The View: George Stephanopoulos, Robin Roberts, Josh Elliott, Lara Spencer. The Talk: Julie Andres, Train. Ellen DeGeneres: Jesse Tyler Ferguson, Rita Wilson.

Late Talk
David Letterman: Amy Poehler. Jay Leno: Jack Black, Daniel Holzman & Michael Chernow, Beirut. Jimmy Kimmel: John Cusack, Vintage Trouble. Jimmy Fallon: President Barack Obama, Dave Matthews. Craig Ferguson: Carson Kressley. Ramin Nazer (rerun). Tavis Smiley: Robert Draper. Carson Daly: James Van Der Beek, Mike D, Kasabian. Jon Stewart: Madeleine Albright. Stephen Colbert: Magnus Carlsen. Conan O’Brien: Metta World Peace, Jerry Crowley, Haley Reinhart. Chelsea Handler: Jason Mraz, Dan Levy, Heather McDonald, Lavell Crawford.