5 random chart facts of the week that might surprise you

Being a "know-it-all" is no bad thing. Get to know more, right now, with our random chart chart facts of the week.

This week's highest climber within the Top 40 is Danish DJ Martin Jensen, whose Solo Dance shimmies 14 places up the chart to Number 25.

Ed Sheeran is Number 1 for a ninth week, and has a record-breaking 16 songs in the Top 40, all of which are from the same album, ÷. Well done, Ed. But that's not all – Ed's impressive combined chart sales hail of 672,000 means ÷ not only outsold the rest of the Top 100 combined, it sold more than the total sales for the next 771 albums. And who do you reckon was at Number 772? It was Coldplay's Viva La Vida (Or Death And All His Friends) with 278 sales. Coincidentally, Coldplay, along with the Chainsmokers, claim the ONLY song in this week's Official Singles Chart Top10 that isn't an Ed Sheeran song.

It's 20 years this week – yes, a whole TWO decades – since Spice Girls scored their fourth straight Number 1 single with double-A side (ask your mum) Who Do You Think You Are/Mama. The song, which was released in support of charity Comic Relief, spent three weeks at the top, and sold 710,000 copies. Plenty of you love to swing it, shake it, move it, and make it all these years later – Who Do You Think You Are has been downloaded 58 times in the last seven days. As for Mama, that's been downloaded 40 times – sure to go up as Mummy's little darlings compile their special mixtapes as we near Mother's Day. 

MORE: View the chart for this week in 1997, with Spice Girls at Number 1

One of the new entries that isn't Ed Sheeran in this week's Official Singles chart is Lorde, who returns with Green Light at Number 28, her first Top 40 entry since Team in February 2014. But how many other songs in the chart's 65-year archive have taken their inspiration from everyone's favourite sequence in the traffic lights? Three other songs called Green Light have hit the Top 40 – the most successful being Roll Deep's version, which hit Number 1 in 2010. Beyoncé's Green Light peaked at 12 in 2007, and John Legend and Andre 3000 teamed up on a version of their own in 2008, and went to Number 35. Two songs called Red Light Green Light made the Top 40 too – but we've no time to wait in traffic here.

MORE: See all the songs called Green Light in the chart's archive

We love to look at how much a random song has sold in a week. Steps, proud purveyors of '90s positive pop, announced a new album and stadium tour this week, with comeback single Scared of the Dark out now. They have million-seller in the shape of double-A side Heartbeat/Tragedy, but remember their first Top 5 hit One For Sorrow? It's scored total sales of 422,000 copies since its release in 1998, and reached Number 2 – thwarted by Manic Street Preachers for the Number 1 spot – imagine. It seems that the love hasn't gone for the track, as 70 of you downloaded One For Sorrow just this week, while it's racked up 24,000 plays – well over double its usual weekly figures. Steps Mania is ON!

MORE: All Steps' hit singles and albums in their archive

Got a chart fact you've been dying to know and wouldn't mind seeing us unravel right here? Tweet us using #ChartFact (funnily enough) and we might just pick yours!

Take a look at this week's full Official Singles Chart Top 100