Singer Billy Joel and his daughter Alexa Ray Joel perform during the Rainforest Foundation Benefit Concert in New York, in this May 8, 2008 file photo. // Billy Joel (REUTERS/Keith Bedford/Files)

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Singer Billy Joel and his daughter Alexa Ray Joel perform during the Rainforest Foundation Benefit Concert in New York, in this May 8, 2008 file photo.

He may be a musical genius but this Grammy award-winner hasn't enjoyed the same string of success when it comes to his finances. He has had to file for bankruptcy and filed a $90 million lawsuit against his former manager (and former brother-in-law) Frank Weber for losing tens of millions of dollars as a result of fraud, risky investments and unauthorized loans.