The Unforgettable singer died of complications from an ongoing medical condition on New Year's Eve (31Dec15), and her sisters Timolin and Casey, 54, were among the people who confirmed the sad news on Saturday (01Jan16).

Now, the twins have opened up about the last Christmas they spent with their dying sister, telling People magazine Natalie was a big fan of the season.

"Christmas Eve has always been a magical time for Natalie because she looked forward to the season and being surrounded by loved ones," Timolin said.

The sisters and Natalie's nephews Robbie, Sage, Haleigh and Teo, joined the singer in Los Angeles for Christmas Eve and Timolin added, "We had a wonderful evening where we reminisced about holiday traditions of the past and present, including decorating every inch of her Hancock Park home with vintage Christmas ornaments and finery."

"Christmas has always been a special time of the year for the Cole family, because it is the time we most vividly remember our father (Nat King Cole), his music, and our early holiday traditions."

And as the sisters prepare to say goodbye at Natalie's funeral, they're thanking fans for their tributes.

"As our sister Natalie is remembered, it is our hope the focus will not be on her death, but will be on the countless moments of joyful music that she leaves for us all," Casey added. "We join her son, Robbie, in expressing our gratitude for the support we have received from her friends and fans that she loved so dearly."