They’re quite the dynamic duo, making frequent public appearances together yet deny any romantic affair.
Nick, 34, kept the crowd grooving as he spun a DJ set, while Amber, 31, served as host.
Amber stunned amidst the crowd in a plunging white bandage dress that showcased her ample cleavage to the fullest.
The mother-of-one was generous with the eyeliner and mascara, while highlighting her pout with pale lipstick.
She got to take time off mommy duty from two-year-old son Sebastian, whose father is her estranged husband Wiz Khalifa.
Amber, who abruptly filed for divorce from the 27-year-old rapper in September and Nick who confirmed last August that he and wife Mariah Carey had separated were subsequently rumoured to had developed a romance.
But Amber has repeatedly denied all the claims saying they are just good business partners wrting on Instagram
"Every time I post a pic of me and this Man y'all start reaching... We are friends and business partners nothing more. We have beautiful children and ppl we still love very much no matter what. I don't know how many times I need to say this but this will be my last time. WE ARE JUST FRIENDS!! Ok f**kers?”