David Cassidy: A Rocking Romancer to Millions of Young Fans

David Cassidy on Oct. 27, 1978. 

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New York (AP) -- David Cassidy could sell the heck out of uncertainty.

"I Think I Love You," the smash hit that in 1970 launched the Partridge Family musical group plus the ABC comedy-with-songs show of the same name, found Cassidy center stage delivering such lyrics as "I think I love you, so what am I so afraid of?/ I'm afraid that I'm not sure of a love there is no cure for."