Yeah, Casey did a Top 40 Million Sellers of the 80s countdown on Thanksgiving weekend. It was the only instance (besides the year-end shows) where the a special countdown pre-empted the regular show. Throughout 1990, there were several special shows, each of them "The Biggest (insert configuration here) Hits Of The 1980s", but stations were given a choice between running a regular show or the special. The stations on which I caught CT40 ran the regular weekly shows in their regular time slot, but for the "Million Sellers Of The 1980s", stations weren't given a choice and the upcoming show was mentioned many times during the countdowns of the previous two or three weeks. This would turn out to be Casey's final special show (except for the year-enders).
Anyway, back to the show I mentioned earlier. It was the "Top 40 Hits Of The 1980s" and stations were given the option to run it the weekend of January 6, 1990. My station ran a regular show that weekend, but they aired the "Top 40 Hits Of The 80s" show on Christmas Day. It wasn't very accurate, because of the two different chart sizes during the decade as well as the fact that the charts moved much faster in the late 80s than they did in the first half of the 80s (and, I'm sure, because they were afraid they'd melt if they played too many songs from the early 80s).
I have a list of it somewhere, but I don't know where it is. If I find it, I'll be sure to post it. If someone else has it then, by all means, post it here.
I do know that the #1 song of 1986, "Stuck With You" by Huey Lewis & The News, kicked it off and the #1 song was, to nobody's surprise, "Every Breath You Take" by the Police.
Every #1 song of the year was among the list except for "Get Outta My Dreams, Get Into My Car" by Billy Ocean.
Here are the two mentioned 80s charts. I saved them years ago from the, long defunct, Pop Music Chart Archive site which used to post Casey's chart every week.
The first weekend of 1990, stations were given an option to play the first special. It wasn't a decade-end chart, per se, but billed as the "top 40 #1s" of the decade. It's, actually, a pretty balanced chart. If you count each song toward the year in which it peaked, then there are, exactly, 4 songs for each year of the decade here. It seems, largely, inaccurate for a "true" decade-end chart. Some rankings seem odd (would "Man In The Mirror" really have been bigger than "Billie Jean" or "Beat It"?) and restricting the list to #1s keeps some other big hits off the chart (on a "real" decade-end chart, big #2s like "Physical" and "Keep On Loving You" may have made the top 40).
CASEY'S TOP 40 - TOP 40 #1S OF THE 1980S - JANUARY 6, 199040 Huey Lewis and The News - Stuck With You
39 USA For Africa - We Are The World
38 Boston - Amanda
37 Billy Joel - It's Still Rock And Roll To Me
36 Madonna - Live To Tell
35 Toto - Rosanna
34 Dionne and Friends - That's What Friends Are For
33 Huey Lewis and The News - The Power Of Love
32 U2 - With Or Without You
31 Christopher Cross - Sailing
30 Michael Jackson - Man In The Mirror
29 Madonna - Crazy For You
28 Steve Winwood - Roll With It
27 Richard Marx - Right Here Waiting
26 George Michael - Faith
25 Rick Springfield - Don't Talk To Strangers
24 Bon Jovi - Livin' On A Prayer
23 Phil Collins - Against All Odds (Take A Look At Me Now)
22 Madonna - Like A Prayer
21 Prince and The Revolution - Let's Go Crazy
20 Kenny Rogers - Lady
19 Men At Work - Down Under
18 Debbie Gibson - Lost In Your Eyes
17 Survivor - Eye Of The Tiger
16 Diana Ross and Lionel Richie - Endless Love
15 Whitney Houston - I Wanna Dance With Somebody (Who Loves Me)
14 Prince and The Revolution - When Doves Cry
13 Janet Jackson - Miss You Much
12 Lionel Richie - Say You, Say Me
11 George Michael - Father Figure
10 Kim Carnes - Bette Davis Eyes
09 Irene Cara - Flashdance...What A Feeling
08 George Michael - One More Try
07 Paul McCartney and Michael Jackson - Say Say Say
06 Van Halen - Jump
05 Daryl Hall and John Oates - I Can't Go For That (No Can Do)
04 Blondie - Call Me
03 Foreigner - Waiting For A Girl Like You
02 Journey - Open Arms
01 The Police - Every Breath You Take
The other 80s chart is more straightforward. As the title implies, it's a sales chart ranking the 40 biggest platinum singles of the decade. Interesting to note that "Pump Up The Jam" and, I think, "Back To Life" didn't reach their airplay peaks until 1990. Apparently, they sold enough singles in the 80s to qualify for this list.
CASEY'S TOP 40 - TOP 40 MILLION SELLERS OF THE 1980S - NOVEMBER 24, 199040 Kool and The Gang - Celebration
39 Milli Vanilli - Blame It On The Rain
38 Bobby Brown - On Our Own
37 New Kids On The Block - Hangin' Tough
36 Madonna - Crazy For You
35 Janet Jackson - Miss You Much
34 Richard Marx - Right Here Waiting
33 Soul II Soul featuring Caron Wheeler - Back To Life (However Do You Want Me)
32 Joe Cocker and Jennifer Warnes - Up Where We Belong
31 Paula Abdul - Straight Up
30 Kenny Loggins - Footloose
29 Dionne and Friends - That's What Friends Are For
28 Madonna - Like A Prayer
27 REO Speedwagon - Keep On Loving You
26 Paul McCartney and Stevie Wonder - Ebony And Ivory
25 Cyndi Lauper - Girls Just Want To Have Fun
24 The Beach Boys - Kokomo
23 Paul McCartney and Michael Jackson - Say Say Say
22 Milli Vanilli - Girl You Know It's True
21 Michael Jackson - Thriller
20 Prince - Batdance
19 Phil Collins - Against All Odds (Take A Look At Me Now)
18 Whitney Houston - I Wanna Dance With Somebody (Who Loves Me)
17 Ray Parker Jr. - Ghostbusters
16 Michael Jackson - Billie Jean
15 Madonna - Like A Virgin
14 Technotronic featuring Felly - Pump Up The Jam
13 The Police - Every Breath You Take
12 Prince and The Revolution - Let's Go Crazy
11 Bonnie Tyler - Total Eclipse Of The Heart
10 Tone-Loc - Wild Thing
09 Michael Jackson - Rock With You
08 Michael Jackson - Beat It
07 Kenny Rogers and Dolly Parton - Islands In The Stream
06 Prince and The Revolution - When Doves Cry
05 Queen - Another One Bites The Dust
04 Diana Ross and Lionel Richie - Endless Love
03 Survivor - Eye Of The Tiger
02 Olivia Newton-John - Physical
01 USA For Africa - We Are The World