From left: Kanye West, Kim Kardashian, Joyce Bonelli, Carla DiBello and Simon Huck
10/29/2012 AT 06:00 AM EDT
Happy (almost) Halloween!
and Kanye West
celebrated Halloween early when Kardashian hosted the 2nd Annual Midori Green Halloween at Avenue in New York City on Saturday.
Kardashian's friends La La Anthony
, Simon Huck, Carla DiBello and Joyce Bonelli
Dressed as a mermaid – with a blonde wig valued at more than $2,000! – all eyes were on Kardashian.
"Even though the group was lively throughout the evening – posing for pictures, dancing, ordering bottles of Midori – Kanye stole a couple of sweet moments with Kim," a source tells PEOPLE. "They kissed a few times and he was rubbing her back. At one point, she whispered something in his ear and his face lit up."
"Kanye kept bragging to his friends about how beautiful Kim looked," the source adds. "And that he loved her as a blonde!"
"Fun times last night @kanyewest @joycebonelli @carladibello @simonhuck," Kardashian Tweeted on Sunday
– Carlos Greer