5 random chart facts of the week that will get you thinking…

Random observations, fun facts and highlights from this week's Official Chart.

Bamboozle your pals and be the toast of any pop quiz – we've got some new random chart facts to get your brain buzzing.

This week's highest climber? That honour goes to Zedd and Alessia Cara, who vault 15 places to Number 23 with Stay.

Julia Michaels finally breaks into the Top 40 this week with Issues, but she's not the first to bring her Issues to the chart. Back in 2008, the Saturdays reached Number 4 with their identically titled song, selling 274,000 copies in the process (it's also the only other song called Issues to chart in the UK). 34 of you have downloaded that Sats' song this week, FYI.

We asked our Twitter fam which chart facts they were dying to know. Here's one:

The youngest person to ever have a Number 1 single is Little Jimmy Osmond, with Long Haired Lover From Liverpool, at the age of 9, in 1972. The youngest person ever to go straight in at Number 1 is Billie – who became known as Billie Piper later in her career. She was 15 when Because We Want To entered at the top in 1998. 

Marc Almond is a new entry in this week's Official Albums Chart, with career retrospective Hits and Pieces – The Best Of going straight in at  7. Marc last had a Top 10 album 26 years ago, when Memorabilia reached Number 8.

MORE: Look back at Marc Almond's UK chart career in the archive

As you know, we love to take a lucky dip into the archive to see how a vintage classic is doing. As the world celebrates St Patrick's Day, we're marking the occasion with a look at B*Witched's classic C'est La Vie. It was Number 1 for two weeks in June 1998, has sold 924,000 copies and is one of the biggest selling songs by an Irish act of the last 20 years, but is it still finding its way into your hearts (and ears)? It turns out 255 of you have downloaded the song this week – prepping your St Patrick's Day mixtapes, perhaps – while its racked up 83,300 plays. What are you like, eh?

MORE: All B*Witched's hit songs and albums in our 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