Fresh from their various reality shows, talk shows, comedy shows, rock shows and skate competitions, Paris Hilton, Tony Hawk, Ashlee Simpson, Dave Chappelle, Jon Stewart, Lenny Kravitz, P. Diddy, Ludacris and LL Cool J have all been added to the list of celebrities appearing at the 2004 MTV Video Music Awards on August 29. (click for photos of Ashlee Simpson and more from the 2004 VMA Red Carpet)

A raft of hip-hop artists have been added to the list of performers as well, including Lil Jon, Petey Pablo, the Ying Yang Twins and Terror Squad featuring Fat Joe. Chappelle will also perform, although there's no word on whether he'll also play the roles of Rick James, Prince, fellow performer Lil Jon or any other celebrity the comedian channels on his "Chappelle's Show." (check out photos from backstage at the 2004 VMA)

The newly announced performers and guests will join Usher, Kanye West, Jessica Simpson, Hoobastank, Yellowcard and Jet, already slated to perform at the 2004 VMAs in Miami (see "Jay-Z, Beyonce, No Doubt, Outkast Lead Pack Of VMA Nominees"). The show will take place at Miami's American Airlines Arena on August 29 and will be broadcast live at 8 p.m. on MTV (tape-delayed on the West Coast). (click here for photos from on stage at the 2004 VMA)

Leading this year's pack of nominees is Jay-Z, who nabs six nominations for his "99 Problems" clip, and Beyoncé, No Doubt, Usher and Outkast have five nominations (check out the complete list of nominees).

The Viewers' Choice Award will be determined this year by the VMAyhem Viewer's Choice PlayoffsVMAyhem Viewer's Choice Playoffs, which allow MTV.com users to narrow a list of 40 videos down to five nominees through head-to-head video battles. Voting on the five final nominees will begin on August 18.

Catch all the sizzlin', star-packed VMA action direct from Miami on August 28. MTV News' preshow kicks things off at 6:00 p.m. ET/PT, followed by the big show at 8 p.m.

Vote for the Viewer's Choice Award, see a timeline of MTV Video Music Awards history, and more at our VMA web site.

Check out red carpet highlights, backstage reports, and all our VMA news in the VMA News archive.