Jeremy Piven (“Entourage”) hosts “Fashion Rocks” (8 p.m., CBS), the fourth annual concert to celebrate the beginning of some fashion season or another. Or is it one of many fashion weeks?

The collusion of the fashion industry and the music business is not a new one. The recent release of Pattie Boyd’s memoirs “Wonderful Tonight” (Harmony, 2007) reminds us how fashion models have been an integral part of the music scene for more than 40 years. Boyd, a fashion model who delivered one line in the 1964 movie “A Hard Day’s Night,” would go on to marry both George Harrison and Eric Clapton and inspire three love songs, Harrison’s “Something,” and Clapton’s “Layla” and “Wonderful Tonight.”

Scheduled performers on tonight’s “Fashion Rocks” include Aerosmith, Alicia Keys, Avril Lavigne, Carrie Underwood, Fall Out Boy, Fergie, Jennifer Hudson, Jennifer Lopez, Ludacris, Martina McBride, Santana and Usher.

Aerosmith fans can also catch a conversation with Steven Tyler on “The Henry Rollins Show” (10 p.m., IFC).

¢ Cesar Millan returns for a fourth season of “The Dog Whisperer” (7 p.m., National Geographic), which will feature 35 brand-new episodes. On the season premiere, Cesar sets out to calm the scene at a “dog-friendly” apartment complex where clashing canines have made life a nightmare for the tenants.

As fans of the series already know, he sees it as his job to rehabilitate the dogs and “train” the humans.

Nine times out of 10, it’s the biped on the end of the leash that is sending out the bad vibrations.

For those who like to do their dog whispering between the covers, Millan’s new book, “Be the Pack Leader” (2007, Harmony), will be published Oct. 2. His first book, “Cesar’s Way,” was a national best-seller.

¢ The Peanuts gang star in the 2003 animated special “Lucy Must Be Traded, Charlie Brown” (7:30 p.m., ABC).

Set in Charlie Brown’s field of nightmares – the baseball diamond – “Lucy” does not reflect “Peanuts” at the top of its game. The production flows more like a succession of daily strips than a coherent story. While gentle humor abounds, “Lucy” never reaches the poignant heights of classics like “A Charlie Brown Christmas” or “It’s the Great Pumpkin, Charlie Brown.”

¢ A series of 22 songs and online videos unfold as the bizarre feature film “Trapped in the Closet” (8 p.m., IFC), created by and starring musician R. Kelly. Dubbed a “hip-hopera” by its creator, “Trapped” has generated a great deal of buzz in both print and online. The excitement and shock value of “Trapped” remain overshadowed by Kelly’s legal status. While his trial has been postponed repeatedly, he faces multiple charges of child pornography.

Tonight’s other highlights

¢ There goes the neighborhood on “Jericho” (7 p.m., CBS).

¢ Harrison Ford and Josh Hartnett star in the 2003 mystery “Hollywood Homicide” (7 p.m., Fox).

¢ Rocket Dog steps in for the missing Flower on “Meerkat Manor” (7:30 p.m., Animal Planet).

¢ DNA evidence clears a man Adrian put away on “Monk” (8 p.m., USA).

¢ “Expose” (9 p.m., PBS, check local listings) shows how death-row inmates have been denied a rigorous legal defense despite a Supreme Court mandate to provide one.

¢ Up north to Alaska on “Survivorman” (8 p.m., Discovery).

¢ A dying man (Brian Dennehey) sparks a new investigation of an old murder on “Law & Order: Special Victims Unit” (9 p.m., NBC).

¢ Scheduled on “20/20” (9 p.m., ABC): a look inside the human body.

¢ In search of a super nanny on “Psych” (9 p.m., USA).