Celebrating this year's Oscars, Nicole took to the stage with Gary Barlow at the official Harvey Weinstein pre-party - reuniting with the Take That singer after sitting on The X Factor panel with him for two years.
Following their performance, the 'Your Love' singer then headed to Elton John's Oscar bash, bumping into yet another of her X Factor co-stars - Sharon Osbourne!
Taking to Instagram, Nicole shared a photo of herself with Sharon. In the snap, the former X Factor judges are pictured looking ultra-glam in their evening gowns.
Alongside her photo, Nicole said: "I love this [woman] @sharonosbourne #queen #boss #latergram #Oscarparty."
Nicole and Sharon starred alongside each other on The X Factor back in 2013. Returning judge Sharon - who started as an original on the panel - later went on to win the series with her act Sam Bailey.
And making sure her girl stole the title, Sharon even roped in the help of her co-star as Nicole performed a duet with Sam on the night.
The girls' reunion comes after Nicole performed on stage with Gary at an Oscars pre-party in Beverly Hills. Taking to the stage the pair wowed the crowd, along with Rita Ora and Glee star Matthew Morrison who also showcased their vocals at the bash.
Enjoying being back in the company of her co-star, Nicole shared a photo of herself and Gary for followers to see.
She told fans: "#latergram so much fun to share the stage with #GaryBarlow last night at the #weinsteinoscarparty #living #soblessed2sing."
Nicole's appearance in LA comes after the starlet recently confirmed she had split with boyfriend of seven years Lewis Hamilton.
Addressing their break-up, Nicole revealed it was a mutual decision to call time on their relationship, insisting she and Lewis still have nothing but "love" and "respect" for each other.
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Watch Nicole perform with Sam Bailey on The X Factor final 2013 here: