Here's the list, compiled in 1999, of the 25 worst videos. Ranked by MTV viewers in 1999.
The 10 "worst" were destroyed and banned... though the irony is that MTV doesn't, or very rarely, air music videos. Also they pretty much neglect anything from the 20th century besides selected artists like Madonna, U2, and some hardcore rappers. Also notice that most of the videos are from the later 1980's/early 1990's.
On the special, a mannequin of Deb was destroyed...
Hosted by 4 or 5 comedians, which Chris Kattan, Janeane Garofalo, and Jon Stewart were among the group.
25. Spin Doctors "Two Princes"
Average video and an OK song.24. Hammer "2 Legit 2 Quit"
Not a good song and the video's cheesy. Though I actually like "U Can't Touch This" better and the video for it's camp value.23. Wilson Phillips "Hold On"
Average video22. Chumbawamba "Tubthumping"
Horrible song, though the video's quite average21. Billy Squier "Rock Me Tonight"
From what I've heard, the video ruined his popularity.20. 4 Non Blondes "What's Up"
Bad song, typical mid '90's video19. Motley Crue "Without You"
Not their best, though the video's somewhat average. Different for hair metal and kinda reminds me of Tears For Fears' "Sowing The Seeds Of Love".18. Snow "Informer"
Annoying song, though I don't think I've ever seen the video in it's entirity. Besides about a minute on the "25 Lame" special. Cheesy...17. Paula Abdul "Rush Rush"
Actually an OK song and a decent video that's a homage to the 1950's movie "Rebel Without A Cause" and features Keanu Reeves of "Bill & Ted's Excellant Adventures" and later movies like "The Matrix".16. Warrant "Heaven"
Good song, average hair band video with band performing, backstage, etc.15. Crash Test Dummies "Mmm Mmm Mmm Mmm"
Average14. Aqua "Barbie Girl"
Ugh, one of the worst music videos of the 1990's and pretty much describe most of the female pop acts from 1999 to the present...13. Journey "Separate Ways"
I can't stand the band...12. Winger "Seventeen"
A bad '80's hairband video with a very politically incorrect song. Catchy though11. Wham! "Wake Me Up Before You Go Go"
Ahhh! one of the worst videos from the 1980's. It's an OK song, but the video contains too much Day Glo! They had better hits like "Careless Whisper" & "Last Christmas". George Michael later had a successful solo career.10.
Debbie Gibson "Electric Youth" 
Though it's not one of her best nor worst songs, it's still a fun video to watch. Strongly disagree since I find most videos from current rappers & pop acts awful and tasteless. Actually, this is the first time I've ever seen the music video. Though only for about two minutes with dumb commentary.9. Vanilla Ice "Ice, Ice, Baby"
Just plain awful. He makes K Fed sound like The Beastie Boys. As for the video, it's boring and looks very amaturish. Vanilla Ice actually appeared on the special and trashed a copy of the video and also destroyed a mannequin of Deb.8. Milli Vanilli "Girl You Know It's True"
'Nuff said.7. Gerardo "Rico Suave"
...good with sound off since there's cute female dancers wearing spandex 6. Hall & Oates "Maneater"
Good song, average video5. Los Del Rio "Macarena"
Horrible and pretty much a bad fad.4. Nelson "After The Rain"
Only seen the video on "25 Lame" special, though with commentary interrupting the song.. though aired it by it's entirity. The video's overly cheesy and Nelson are to hair metal as Vanilla Ice is to hip hop.3. Eddie Murphy featuring Michael Jackson "Whazupwitu"
Also only seen video on the special. Really horrible and a looks cheap with the blue screen effect of MJ, Eddie Murphy, and a chior looking as if they're on clouds. Even for the early '90's.2. Chunky A "Owww!"
See # 3 & #4. Overly cheesy, though it was meant to be "Chunky A" was actually meant to be a joke from comedian/talkshow host Arsenio Hall. Agree that it's a bad video.1. Don Johnson "Heartbeat"
Cheesy enough, though Vanilla Ice deserves the #1 spot, IMHO.