"Just wanted to wish everyone happy holidays & all the best for 2015!" she wrote. "PS Simon & I are still very much together, don't believe what you read x."
Just wanted to wish everyone happy holidays & all the best for 2015! PS Simon & I are still very much together, don't believe what you readx— Adele (@OfficialAdele) December 28, 2014
The notoriously private singer broke her silence on reports that she and Simon, who have a two-year-old son named Angelo, have been living apart.
The Sun On Sunday reported that Simon, 40, had moved out of the home he shared with the 26-year-old singer and that they had hardly seen each other in the past eight weeks.
Adele's partner Simon is the CEO of charity Drop4Drop
The reports came a week after the couple and their son were unable to attend Sir Elton John and David Furnish's wedding on 21 December.
"Biggest congratulations my loves," read an apology note the singer sent the happy couple on their big day. "Have a wonderful day. I'm sorry we are not there. See you in 2015. Love Adele, Simon and Angelo. x."