Lisa's First Word Bart was two during the flashback. Maggie's first word was provided by the Academy Award-winning actress Elizabeth Taylor, who would also voice herself in the season four finale, "Krusty Gets Kancelled". While promoting the episode, the producers initially did not reveal who the voice of Maggie would be, prompting speculation as to the identity of the actress. Although it was only one word, the voice came out "too sexy" and Taylor had to record the part numerous times before the producers were satisfied and thought it sounded like a baby. Several sources, including John Ortved's "The Simpsons" history article "Simpsons
The Simpsons: Testify Branson," which pays tribute to all the washed-up celebrities of yesteryear. ... So even if the show is no longer appointment viewing in your house, this CD definitely warrants another trip to Springfield." The Simpsons: Testify The Simpsons: Testify is an album that features songs from the animated television series "The Simpsons". It was released on September 18, 2007. It includes appearances by artists such as Jackson Browne, Shawn Colvin, David Byrne, The B-52's, The Baha Men, NRBQ and "Weird Al" Yankovic, and an alternate version of the end credits performed by Los Lobos. Ricky Gervais, Steve Buscemi and Kelsey