“IGo to Japan” (8 p.m., Nickelodeon): Nickelodeon premieres a movie-length version of

“IGo to Japan” (8 p.m., Nickelodeon): Nickelodeon premieres a movie-length version of its popular comedy series “iCarly,” called “iGo to Japan.” Teenage Webcast impresarios Carly (Miranda Cosgrove), Sam (Jennette McCurdy) and Freddy (Nathan Kress) are determined to get to Japan, whatever it takes, to compete for the ultimate Internet prize: Best Comedy Web Show in the World. Misadventures ensue.

“My Big Redneck Wedding” (9 p.m., CMT): Any celebration of nuptials that ends with the bride and groom plunging into a mud pit can’t be all bad, so tonight’s edition of “My Big Redneck Wedding” sounds especially promising. Let’s just hope they get hosed off before the honeymoon.

“Mail Order Bride” (9 p.m., Hallmark Channel): A woman working for a con man has one more job to pull before she’s free of him.

“True Jackson, VP” (9:30 p.m., Nickelodeon): Can a high school girl be a fashion mogul? That’s a no-brainer for True Jackson, who one minute is selling sandwiches outside the offices of a major fashion label, and the next minute is hired to run its youth division. How she manages to juggle her many responsibilities is the subject of “True Jackson, VP,” a new live-action comedy series premiering tonight. True finds the rag trade is a blast, even with its pressures and petty politics. No big deal: She’s been preparing for corporate culture for years in the classrooms and corridors of her school! “True Jackson, VP” stars 15-year-old Keke Palmer, who played the title character in the film “Akeelah and the Bee,” and recently released her first album, “So Uncool.”