The 22-year-old star said she was shocked that her new single is at the top of the UK charts and even more so that her albums, her new record 21 and debut offering 19, are both in the top five as well.
Writing on her website, she said: 'I am absolutely speechless. I didn't know what to do with myself when I found out someone like you was number 1! That song is so special to me and it's even more so now, thank you so much.
'And who the hell is still buying the album at home? Rolling in the deep was on the advert for corrie eeek! I had a brilliant time at the Brits last week, I felt very honoured and proud to be there.
'Sorry I cried, I'm just so overwhelmed. I'm in NY at the moment, doing letterman tonight and off to LA tomorrow if the snow stops.
'The albums out here tomorrow too, I'm s***ting myself. I just wanted to drop in and say thank you and bring you up to date a little.'