Cher brings her 1999 world concert tour, her first in eight years, to HBO Sunday at 9 p.m. "Cher: Live in Concert at the MGM Grand in Las Vegas," a 90-minute show, features hits from throughout the singer's four-decade career.

The MGM presentation also will be highlighted by a glittering set, dazzling costumes and six dancers choreographed by Dorian Sanchez.

But most of all there will be Cher, the only female singer to score a top-10 hit in each of the last four decades: "I Got You Babe" in the 1960s; "Gypsys, Tramps and Thieves," "Half Breed" and "Dark Lady" in the 1970s; "If I Could Turn Back Time" in the 1980s; and her current biggie, "Believe." The latter has topped the charts in 23 countries and sold more than 5 million singles and 8 million albums of the same name.

Sunday on A&E Network at 8 p.m., "The Rise of the Outlaw Motorcycle Gangs," a two-hour look at the country's motorcycle culture, how it began after World War II, its bad days and changing face. Repeats at 10, midnight and 2 a.m.

Sunday on TNT at 8 p.m., the U.S. debut of "Diana: A Tribute to the People's Princess," a two-hour drama chronicling the last year in the life of Diana, Princess of Wales, and starring Amy Clare Seccombe and George Jackos. Repeats Sunday at 10:10 p.m., Saturday at 8 p.m. and Sunday, Sept. 5, at 6 p.m.

Sunday-Saturday on Animal Planet at 8 p.m., "Crocodile Hunter Week," seven one-hour shows that include three premieres: "Steve's Most Dangerous Adventures" on Monday, "Africa's Deadliest Snakes" on Tuesday and "Wild River of Africa" on Tuesday.

Sunday on Discovery Channel at 9 p.m., "Napoleon's Lost Fleet," a look at what divers found in Egypt's Aboukir Bay, where 200 years ago Adm. Horatio Nelson and the British Fleet defeated Napoleon. The French fleet included his 15-ton flagship, L'Orient, which carried 120 cannons on its four decks.

Sunday on the History Channel at 10 p.m., "Modern Marvels: Newspapers," a one-hour program detailing how newspapers have recorded history and made history in the process, have made and destroyed politicians and personalities as well as how the press tycoons amassed fortunes. Repeats at 2 a.m.

Tuesday on A&E Network at 10 p.m., "City Confidential: Greenwich Village" tells the story of husband-and-wife artists Carl Andre and Ana Mendieta. She died after falling from an open window of their 34th floor apartment during an argument; he was acquitted of second-degree murder charges when his lawyer argued there was reasonable doubt about his role in her death. Repeats at 2 a.m.

Saturday on Disney Channel at 7:30 p.m., "P.U.N.K.S.," an original movie about a group of 13-year-old misfits and a mysterious gadget they have stolen. The cast includes Randy Quaid, Henry Winkler, Lanny Nygren, Samantha Swaboda and Tom, Drew and Wanda Utler. Repeats at 10 p.m. and Sept. 5, 7, 9, 15 and 20.

Saturday on A&E Network at 9 p.m., "Dalziel and Pascoe: The Wood Beyond." In this mystery movie, the detectives need to find out if a protest by a group of animal rights activists is motivated by an objection to a pending merger or is a coverup for a car accident and a murder. Repeats at 1 a.m.