Everything is B-I-G when you are a top-earning music star. Most begin their careers as artists, but when their star power develops, entrepreneurship sets in and business goes beyond the main stage. Take Dr. Dre, Janet Jackson and Prince, for example, who got their starts as artists more than 20 years ago but have solidified their places as forces to be reckoned with in the music business. From Prince’s $100 million Warner Bros Records contract to Dre's recent ground breaking multi-billion dollar sale of Beats, artists are pushing the envelope, surpassing the typical endorsement deals and business ventures, and topping the Forbes lists while doing so. Read on to see other music stars who've cashed out with mega acquisitions.