Lively had been invited because her non-alcoholic drinks brand, Betty Buzz, recently entered into a partnership with British Airways.
Sharing photographs from the evening to her Instagram story, Lively poked fun at various aspects of her outfit and offered apologies to several designers.
“I’m sorry Max Mara that I tied your coat like I’m the fifth Golden Girl. Wow, it’s divine though,” she said.
“I’m sorry to the colour pink for using you to cheat on my red look with this stunning Chanel bag,” she added.
Lastly, she apologised to Spanish designer Blahnik for painting over the jewels of a £795 pair of heels with red nail varnish.
“I’m sorry Manolo Blahnik for painting the white jewels on my shoes with red nail polish as I was walking out the door. Worth it though?” she said.
Last month, British Airways announced that its lounge at John F Kennedy International Airport (JFK) in New York City will serve Lively’s Betty Buzz drinks.
“I’ve never felt like I’ve made it more in my life than having a bar and a lounge in JFK,” Lively told People. “It is such a surreal moment.”
“I’ve been very proud of [Betty Buzz] and it’s been really cool and overwhelming to see people’s responses to it. It’s been really neat to see all of the non-drinkers who have come out and said ‘thank you’,” she added.
In a statement announcing the launch of Betty Buzz, Lively said it had taken her three years to create the line of drinks, which can be drunk alone or as a mixer with alcohol.
The brand’s name was inspired by her late father, Ernie, who died in June.
“My dad’s name was Ernest Brown Jr but he was known as Ernie Lively. He gave up his last name when he married my mom and any success, he, or I, experienced has been in a name that isn’t his,” she explained.
“So when I was working hard to build this company, I wanted any success to be in a name that was meaningful to him. Betty was his mom and his sister’s name. Also, Ernie would not be the best name for a mixer,” she added.