How often have the US and UK Billboard charts coincided at #1?

Cafe Society
1

I used to think this happened often, but apparently not. Plenty of songs have been #1 on both charts, just not simultaneously.

Has it ever happened?

2

Ahhh … now that I think about it … I’ll bet’s Elton John’s 1997 tribute song to Lady Di (based on “Candle in the Wind”) probably did it.

3

Here’s every instance between 1955 and 1982 (the years that happen to be covered by my old “Rolling Stone Rock Almanac” which conveniently listed the #1 song in the US and UK for each week).

1/2/57 to 1/16/57: “Singing the Blues” by Guy Mitchell
8/31/57: “Diana” by Paul Anka
5/29/60 to 6/14/60: “Cathy’s Clown” by the Everly Brothers
5/21/61: “Runaway” by Del Shannon
4/4/64 to 4/18/64: “Can’t Buy Me Love” by The Beatles
8/1/64 & 8/8/64: “A Hard Day’s Night” by The Beatles
10/10/64: “Oh, Pretty Woman” by Roy Orbison
11/21/64: “Baby Love” by The Supremes
12/26/64 to 1/9/65: “I Feel Fine” by The Beatles
8/22/65: “I Got You Babe” by Sonny and Cher
11/7/65 & 11/14/65: “Get Off Of My Cloud” by The Rolling Stones
6/25/66: “Paperback Writer” by the Beatles
1/14/67 to 2/4/67: “I’m A Believer” by The Monkees
12/30/67 to 1/13/68: “Hello Goodbye” by The Beatles
7/28/68: “Hey Jude” by The Beatles
5/25/69 & 5/31/69: “Get Back” by The Beatles
8/23/69: “Honky Tonk Women” by The Rolling Stones
4/4/70: “Bridge Over Troubled Water” by Simon & Garfunkel
10/2/71 to 10/30/71: “Maggie Mae” by Rod Stewart
3/4/72 & 3/11/72: “Without You” by Nilsson
4/21/73 to 5/12/73: “Tie A Yellow Ribbon” by Dawn
7/20/74: “Rock Your Baby” by George McCrae
6/19/76: “Silly Love Songs” by Paul McCartney & Wings
8/7/76 to 8/28/76: “Don’t Go Breaking My Heart” by Elton John & Kiki Dee
4/22/78 to 5/6/78: “Night Fever” by The Bee Gees
4/19/80 & 4/26/80: “Call Me” by Blondie
6/21/80: “Funkytown” by Lipps, Inc.
11/1/80 & 11/8/80: “Woman in Love” by Barbra Streisand
1/3/81 & 1/10/81: “(Just Like) Starting Over” by John Lennon

4

Thanks, Fish!

Apparently, this question is a major stumper.