Beyonce sings “Happy Birthday” to Diana Ross at Motown legend's 75th birthday bash

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Gina Ferazzi/Los Angeles Times via Getty ImagesHow do you sing “Happy Birthday” to a music legend? You get Beyonce to do it.

Queen Bey serenaded Diana Ross at her 75th birthday party Tuesday night, in front of celebrity guests including Diddy, Berry Gordy, and the Kardashians.

In a video captured on Khloe Kardashian’s Instagram Story, Ross’ daughter, actress Tracee Ellis Ross, delivers a speech in front of a massive birthday cake. When it’s time to sing, she invites Beyonce up from the crowd.

“Beyonce? Are you still here? Do you want to sing ‘Happy Birthday’? Come on down!” she’s heard saying.

Beyonce obliges and delivers a pitch-perfect rendition of the tune.

Ross did some serenading of her own Tuesday night, too. She took the stage at the Hollywood Palladium in Los Angeles for “Diamond Diana & Family & Friends 75th Birthday Celebration,” performing classic songs by her old group The Supremes and from her solo career.

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