Nicole and Gary, who shared the X Factor judging panel in 2013, took to the stage to perform at the official Harvey Weinstein pre-party and seriously wowed the crowd.
The bash was themed around Finding Neverland and other stars booked to perform included fellow British singer Rita Ora and Glee's Matthew Morrison.
While at the party, which was held at the swish Montage Hotel in Beverly Hills, Nicole joined Gary and his wife Dawn, Matthew and Good Morning Britain's Ross King for a picture.
Sharing the group shot on Instagram today (23 February), she told her followers: "#latergram so much fun to share the stage with #GaryBarlow last night at the #weinsteinoscarparty #living #soblessed2sing."
Meanwhile, Nicole - who recently split with long-term boyfriend Lewis Hamilton - also posted a picture of herself, which was taken moments before she and Gary hit the stage.
In the photo, Nicole is wearing a gorgeous metallic, mesh dress, which she teamed with a gold headband. Alongside it, she commented: "#latergram About to hit the stage to perform at #weinsteinoscarparty! #chopard #oscarweekend."
What a beaut!
For exclusive competitions and amazing prizes visit Reveal's Facebook page NOW!