Jennifer Lopez and Jennifer Lewis sing together at her holiday party

Jennifer Lopez greeted her guests at the holiday party with a sweet song.

On Saturday night, guest Jennifer Lewis joined the Grammy winner, 54, for a special rendition of “Have Yourself a Merry Little Christmas.”

Lopez and her husband, Ben Affleck, hosted a star-studded Christmas party at their home in Los Angeles, with Lewis, 66, Margot Robbie, Michael B. Jordan and Lily Rabe among the many guests in attendance.

During the celebration, blackish The actress sang the classic Christmas song alongside Hustlers a star.

“There was so much love in the room,” Lewis wrote. X (formerly known as Twitter) after a video of the performance went viral. “Great party, baby ♥ ♥ ♥ Happy holidays everyone ♥.”

The video shows the two embracing behind a grand piano and a smaller keyboard. Lopez kept her arms wrapped around her Sister law Actress as the two sang together.

“They had a really fun party,” a source told PEOPLE on Sunday. The insider shared that Lopez led partygoers into singing Christmas carols late into the night.

While Lopez and Affleck were meeting up with friends separately while also hosting, “they were in good spirits,” the source said.

The house is decorated in festive decor with a huge Christmas tree at the entrance. “The kids were all dancing and having a good time, especially the twins and Violet,” adds Maximilian “Max” David Muniz and Amy Maribel Muniz, 15, Affleck’s daughter with Jennifer Garner, and Violet Ann, 18.

Garner (51 years old) and Affleck (51 years old) also share Seraphina Rose (14 years old) and Samuel (11 years old). Lopez shares twins with her ex-husband Marc Anthony.

This is Affleck and Lopez’s second holiday season together after tying the knot in 2022. They were engaged in 2003 and 2004, then reconnected romantically in 2021.

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Before their party, Maid in Manhattan The star showed herself getting into the Christmas spirit when she unveiled her own Christmas tree at her Beverly Hills home, which she shared with Affleck on Instagram. The “On The Floor” singer posted a photo of herself standing in front of a towering evergreen tree decorated with gold ornaments and pine cones.

Lopez matched the colors of her Christmas tree, as she wore a high-waisted skirt with gold embroidery, which she paired with a gold bracelet, a decorated belt, and shiny gold heels.