Producer and archivist Andy Zax explains why he wanted to give listeners a way to relive the original Woodstock with a 38-disc box set. The q This music panel takes a look at the 20th anniversary of Christina Aguilera's pop debut and the recent surge of popularity for the metal band Tool. Sesame Street music director Bill Sherman tells us what goes into making the show's great songs. Grammy award-winning music producer Narada Michael Walden reflects on his hitmaking career with Aretha Franklin, Whitney Houston and Mariah Carey.