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Girl Talk
Darren Hauck, Getty Images
Job: Biomedical engineering
Creating mash-ups is exactly like biomedical engineering in that both require computers. So, enter: Gillis, and his switch from one industry to another in the later 2000s. After graduating from Case Western Reserve University in Cleveland, Ohio, music became both a hobby and career, and Gillis left the world of biomedical engineering behind.











