Complex sentence: Stephanie Lynn "Stevie" Nicks (born May 26,1948) is an American singer-songwriter, who in the course of her work with Fleetwood Mac and her extensive solo career, has produced over forty Top 50 hits and sold over 140 million albums.
Split into simpler sentences: Stephanie Lynn "Stevie" Nicks (born May 26,1948) is an American singer-songwriter. In the course of her work with Fleetwood Mac and her extensive solo career, she has produced over forty Top 50 hits and sold over 140 million albums.