The 22-year-old star's single Someone Like You has now spent three weeks at number one in the chart beating off competition from Lady Gaga and Rihanna.
Her second album 21 is still at number one in the UK while her debut album 19 is still also in the chart and is at number four.
She has also broken the record for the quickest album to sell 1 million copies between the period of January and March.
Martin Talbot, from the Official Charts Company, said: 'We are witnessing a real superstar in the making.
'A million sales in six weeks for one album would be impressive enough but to have another album and two singles continuing to sell so strongly, plus heading both the Official Singles and Albums Charts simultaneously is truly exceptional.'