The "Stay" crooner turned on Mariah's Christmas album as she wrapped gifts on Christmas Eve, lip syncing along with the lyrics as she covered her gifts in snowman-covered wrapping paper.
"Lip synching to @mariahcarey Christmas album is my favorite thing to do at this kinda time!!! #MERRYCHRISTMAS," Rihanna wrote on Instagram Tuesday.
The songbird sported a black t-shirt in the snap along with a red headband topped with an elf hat.
Monday, Rihanna kicked off the week at a Christmas lingerie party in her hometown of Barbados, posting sexy shots of herself in red lingerie next to a Christmas tree.
"@leleboo_phucku lingerie/pajama Christmas party #aftermath #goosehadmefeelinsometypeoway," she wrote on Instagram, along with the snap.
And then she posed on a bed with red sheets with her BFF Melissa Forde.
"#TeamNaughty @mforde11," she went on.
Merry Christmas indeed!