Allee Willis’ songwriting career is studded with some of 20th-century pop’s most indelible songs. With her help, The Rembrandts’ “I’ll Be There for You” became a jangle-pop gem and the ideal theme song for TV’s Friends; another cowrite of hers, Earth, Wind & Fire’s exuberant “September,” is a guaranteed party-starter. A pop craftswoman whose influence is still felt in the 21st century, Willis boasts a catalog packed with hooks and hits.