[3][better source needed] Diamond grew up in Passaic, New Jersey, and graduated from Rider College (now Rider University), where he majored in business and psychology.

[4] In 2024, Gloria Gaynor filed a lawsuit against Diamond claiming he owes her $2 million in royalties under a licensing agreement along with copyright infringement and fraud.

[5] Diamond is also being sued by songwriter Robin Randall for fraud, breach of contract, copyright infringement, and unjust enrichment.

Randall, who, along with her mother, Judithe Randall, co-wrote songs for "Baywatch' and many other television shows, claims Diamond fraudulently coerced her mother into signing over their copyright ownerships while she was incapacitated at Cedar Sinai Medical Center at the end of her life, and also forging Robin's name to the contracts.

She claims he has fraudulently collected royalties for decades while failing to send statements or notifications.