[From Billboard article on couples on the charts together]
http://www.billboard.com/articles/co...ot-100s-top-10
Ask Billboard: Jelena Is Back Together … In the Hot 100's Top 10
2/7/2016 by Gary Trust
On the Dec. 26, 1981 Hot 100, Stevie Nicks ranked at No. 8 with "Leather and Lace," which had reached the top 10 the week before. On the Dec. 26, chart, Lindsey Buckingham rose to No. 10 with "Trouble," joining her in the bracket. The latter would spend three total weeks at No. 10 before climbing to its No. 9 peak for two weeks, all while "Leather and Lace" remained in the top 10, lifting to its No. 6 peak in the former's final week in the region.
So, for five weeks in 1981-82, Nicks and Buckingham each placed in the Hot 100's top 10 simultaneously with their own songs. (Like Bieber and Gomez this week, they avoided back-to-back chart contact throughout that stretch.) Making things potentially more awkward, Nicks had moved on to another … as her hit is a duet, of course, with Don Henley (whom she did date).