Friends actor Sherri Shepherd has claimed that she wasn’t invited back to the show after she made a joke about its lack of diversity.The comedian, who is best known for starring in 30 Rock and How I Met Your Mother, played museum tour guide Rhonda in the episode ‘The One With Phoebe’s Uterus’.TV host and media personality Jawn Murray, a friend of Shepherd’s, told ABC News: “Sherri was one of the few black faces that was on Friends.“Her, Aisha Tyler and Gabrielle Union.