Beyoncé Helps Diana Ross Celebrate Her 75th with Impromptu Rendition of ‘Happy Birthday’ An insider tells PEOPLE that at 11 p.m. the party moved down the street to the Hollywood Palladium for ...

Happy 75th Birthday x2 Joyce Hollingshead Cole from your best ever twin friends of 60 years, since the 7th grade at Roosevelt Middle School. We love you so much and cherish our friendship.

Aside from this, everyone in the party also seemed to have a grand time celebrating the joyous occasion. In the caption, Jinkee kept it simple as she wrote, "Happy 75th birthday Mommy D.