The song – a massive hit last year – was the most sung song on a karaoke website on Thursday.
It accounted for almost one in 10 (9 per cent) of all the 22,000 songs sung on the site that day.
Second most popular was X Factor winner James Arthur’s hit Impossible (6.5 per cent) followed by another break-up track – Adele’s Someone Like You which accounted for 3.8 per cent of all songs sung.
Lucky Voice website boss Nick Thistleton said: “Breaking up is hard to take, and for people who have been delivered the ‘it’s not you ... it’s me’ line in the lead up to Valentine’s Day, it’s a double blow.
“We’ve seen a surge in heartbreak songs in the UK karaoke charts top 10 in recent weeks, which tells us that the start of 2013 has been an emotional relationship rollercoaster for many.”