The singer, 18, rang in the holidays with her family in Nashville, where she and little sister Noah, 10, sang a duet of her summer single "Can't Be Tamed" together.
"Miley and noah are currently singing "can't be tamed" on noah's new karaoke machine," big sister Brandi, 23, Tweeted. "It's pretty hilarious."
She added: "my Mom is videoing … maybe if you're lucky i'll snag it and upload."
Also in Tennessee for the holiday: Billy Ray Cyrus – who filed for divorce from Miley's mom, Tish, in October. A source tells PEOPLE that he spent some quality time with his children over the Christmas holidays at his 500-acre farm outside of Nashville.
In the spirit of the holidays, Cyrus also posted a Christmas message for her fans (watch it below), and shared her goals for 2011. "I want to make this the year that I go out and do what I'm here to do," she says, "and that's to help people and make people happy."
Reporting by MARISA LAUDADIO and MICHELLE TAN