Yoko Ono, wife of Beatles bandmate John Lennon, reminded the singer of how much he is loved by posting a nice message.
Paul McCartney sang "Happy Birthday" to his father and Starr at his show in Norway last night.Steven Tyler was one of the first to post an Instagram with the famous drummer.
Micky Dolenz, singer and drummer from 1960s band The Monkees, posted a picture of the two of them and Graham Nash to wish Ringo a good day.Abbey Road Studios, made famous by the Beatles, wished the 75-year-old a happy birthday as well.
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Paul Stanley, the frontman of rock band Kiss, told "legend" Starr happy birthday and posted a picture on Twitter.