The KarJenner matriarch, 63, glittered in turquoise next to boyfriend Corey Gamble.
April, 24, showed off her post-baby figure in a shimmery pink ensemble. The supermodel just gave birth to her second daughter with boyfriend Robin Thicke on February 26.
Fellow model Heidi, 45, opted to wear a black and white dress with a knee-high slit.
Singer/songwriter Bebe Rexha slayed the fashion game in a bold purple look.
Sisters Khloe and Kourtney Kardashian sported two very different looks for Ms. Ross’ extravaganza. The mother-of-one was slammed online for the curly wig she wore.
Comedian Chris Rock looked dapper in a light blue tuxedo.
New mother Gabrielle Union was seen entering the party with Chris, 54. The Being Mary Jane star stunned in a midriff-baring ensemble.
Diana’s son Evan Ross and his wife Ashlee Simpson may have been the best dressed couple on Tuesday evening.
Her daughter, Tracee Ellis Ross, came ready to be seen in her colorful jacket and dress.
Others, like TI, kept his look low-key, wearing a simple hoodie and sweatpants combo.
Who was your best dressed at Diana’s birthday bash? Sound off in the comments.