The irony is bittersweet. David Cassidy died of organ failure last night, exactly 47 years to the day that "I Think I Love You" topped the Billboard Hot 100. The 1970s teen idol was 67.
"I have known, loved, and admired David Cassidy for 48 out of my 58 years," tweeted Danny Bonaduce, who played Cassidy's impish little brother on "The Partridge Family," the hit sitcom that aired on ABC from 1970-74. "He has been as kind to me as any real brother could ever be. We've been through a lot together and he was always there for me. This loss is huge. RIP my dear friend."
Beau Cassidy, the singer's 26-year-old son, posted a childhood photo on Instagram that shows his father playfully nipping at the young boy's cheek. Beau's caption: "I'll always, always love you."
Here are just some of other celebrity reactions on Twitter to the death of a teenage idol.
Brian Wilson, the Beach Boys: "I'm very sad to hear about David Cassidy. There were times in the mid-1970s when he would come over to my house and we even started writing a song together. He was a very talented and nice person. Love & Mercy to David and his family."
Maureen McCormick, "The Brady Bunch": "So very sad to hear of David Cassidy passing away. He was always so kind and sweet to me. Our shows were both on Friday nights and deep down I dreamt of being a Partridge. His memory and love will live on in my [emjoi heart] forever. Love you David. Prayers to his family."
Marie Osmond: "Heartbroken over the passing of #DavidCassidy. He graced the covers of teen magazines w/ my Brothers in the '70s. My condolences to his Family."
Rick Springfield: "So sorry to hear about David Cassidy's passing. Godspeed."
Gloria Gaynor: "My thoughts and prayers are with the family and loved ones of David Cassidy … part of a musical legacy via his role as "Keith Partridge" that brought music and laughter into the homes of millions…"
Ben Stiller: "#DavidCassidy and The Partridge Family were my childhood. He made a huge impact on my cultural universe. Sending love and respect to his family."
Larry King: "Sad to learn David Cassidy has died. Like his father Jack he had great talent, and a complicated life. Condolences to his wonderful family."