Hawn has been in a relationship with actor Kurt Russell since 1983.
Hawn is the mother of actors Oliver Hudson, Kate Hudson, and Wyatt Russell.
The two funny ladies were joined by their significant others, with Ben tinkling the ivories on a white piano as Kurt Russell joined Goldie and Amy in belting out the chorus to The Beatles' hit Hey Jude.
Judge Judy's bailiff Petri Hawkins-Byrd gingerly holds the sisters apart in one Instagram snapshot, which Amy captioned: 'Ay yo what up Byrd! Going to the dogs: Amy, pictured from behind with her hair tied up into a topknot instructs the pooch, named Gilda, to skedaddle The evening before, Amy had joined her Snatched co-star Goldie Hawn for a singalong.