"The Boss" Diana Ross Gets A Birthday Serenade From Beyonce! (VIDEO)

BEVERLY HILLS, CA – OCTOBER 23: Singers Diana Ross and Beyonce Knowles attend the cocktail reception for the 16th Carousel of Hope presented by Mercedes-Benz benefiting the Barbara Davis Center for Childhood Diabetes at the Beverly Hilton Hotel on October 23, 2004 in Beverly Hills, California. (Photo by Frank Micelotta/Getty Images)

Frank Micelotta/Getty Images

Beyonce sang "Happy Birthday" to Diana Ross with Diddy front and center at Diana Ross' 75th birthday celebration!

My favorite part of this video is when Diana Ross says "to me" while Beyonce is singing!

According to People, "In attendance were members of Diana’s large family (daughter Tracee Ellis Ross, son Evan Ross, and daughter-in-law Ashlee Simpson, among others), as well as longtime friends like Motown founder Berry Gordy and a multitude of stars including Sean "Diddy" Combs, DJ Khalid, French Montana, Kris Jenner, Kourtney Kardashian and Khloé Kardashian." The party started at Warwick in Hollywood and continued at Hollywood Palladium who captured the moment on video.

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"In honor of "Miss Ross", The Phenomenal Women Campaign launched the "I’M GONNA WIN" collection which is "inspired by an iconic photo of Diana Ross wearing a t-shirt with the same phrase. The proceeds will "benefit Higher Heights, which is building Black women’s political power. Photo by @msayles."