Los Angeles - Lady Gaga and Tony Bennett have recorded a Christmas song together.
The two singers - who collaborated on hit album Cheek To Cheek - have duetted on a cover version of festive classic Winter Wonderland and the track is available to download now from iTunes.
Unveiling the song on her Twitter account, Gaga revealed: "Surprise Everyone! Tony & Me recorded the Holiday Classic Winter Wonderland ... Happy Holidays from Tony and Gaga! #TonyGagaWinterWonderlandOnItunes (sic)"
Surprise Everyone! Tony & Me recorded the Holiday Classic "Winter Wonderland l" Get it Here: http://t.co/OsjxSisQjQ ?? pic.twitter.com/OYdKooNYLu
— Lady Gaga (@ladygaga) December 10, 2014
Gaga and Bennett performed Winter Wonderland - originally written in 1934 by Felix Bernard and Richard B Smith - when they switched on the Christmas lights at the Rockefeller Center in New York City last week.
Gaga has already started her Christmas vacation after wrapping up her ArtRave: The Artpop Ball world tour in Paris, France, on 24 November.
The 28-year-old pop star has been busy decorating her Christmas tree and cooking at home and she has also been doing yoga to stay in shape over the festive season.
She tweeted: "Another Holiday day off! I slept and got my hair washed and manicured. now time for some hot yoga while listening to death metal. (sic)"
Listen to the song here: