"It has been incredibly thrilling to embark on a new artistic journey at this stage in my career," Lamas, 48, said. He said his collaboration with Feinstein was "the opportunity of a lifetime."
Lamas said he was "discovered" during a dinner party Feinstein hosted last year.
The "Falcon Crest" star jumped in an sang a tune of his own, after which Feinstein praised his pipes and told him to keep practicing "because you never know where opportunities may come from."
Lamas got a call from Feinstein's six months later offering him the booking Oct. 31-Nov. 11, he said.
As for "The Bold and The Beautiful," Lamas said he remained under contract with the CBS daytime drama "so they have first dibs" on his career.
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