MTV VIDEO MUSIC AWARDS

Sunday at 8 p.m. on MTV

Rap artist Jay-Z is nominated for six moon men at the 21st annual awards ceremony, which honors the best in music videos.

His video "99 Problems," a track from what is said to be his last album, was nominated for best video.

Beyonce, Outkast, No Doubt and Usher garnered five nominations each.

The three-hour star-studded event includes appearances by Dave Chappelle, Paris Hilton, Lenny Kravitz, Tony Hawk, Ludacris, Ashlee Simpson, LL Cool J, Jon Stewart, P. Diddy and many more.

Kanye West and Jessica Simpson are among the scheduled performers for the ceremony, which will be broadcast live from Miami's American Airlines Arena.

A 90-minute pre-show airs at 6:30 p.m.

NICK NEWS SPECIAL:

ROLLIN' DOWN THE RIVER

Sunday at 8:30 p.m. on Nickelodeon

Six kids and their six guardians are led on a 10-day boat trip down the Amazon and through the rain forest by a nature and conservation guide.

The explorers will meet some of the indigenous people of the area, study plants and animals that inhabit the region and learn about how to preserve the natural resources and land.

DOG THE BOUNTY HUNTER

Tuesday at 10 p.m. on A&E

Bounty hunter Duane "Dog" Chapman, 51, and his wife/business partner Beth Smith are the focus of this new half-hour reality series, which premieres with two back-to-back episodes.

The show focuses on the home and professional life of the father of 12 children -- some of whom assist with the family business -- and on the fugitives he pursues.

Chapman, who was once imprisoned for being on the wrong side of the law, now vows to stay on the right side and to help those he captures give up their lives of crime.

He is probably most famous for his participation in capturing convicted rapist Andrew Luster, the Max Factor heir.

Chapman and his employees travel just a few blocks or as far as Hawaii in search of their quarry. During his 27-year career, Chapman has captured 6,000 fugitives and operates offices around the country.

Rock-and-roll legend and MTV reality star Ozzy Osbourne provides the theme song for the series.

dave chappelle: for what it'S worth

Saturday at 9 p.m. on Showtime

District native Dave Chappelle, star of Comedy Central's sketch-comedy series "Chappelle Show," returns to his roots as a stand-up comedian in this one-hour special from San Francisco.