The Simpsons (1989): Season 27, Episode 7

27 - 7: Lisa with an 'S'

When Homer loses $5,000 at a poker game with Broadway legend Laney Fontaine, the only way he is able to settle the bet is if he loans Lisa to Laney for a month. Then, Laney turns Lisa into a show biz kid and Marge and Homer fear they made a mistake letting her go. So they head to New York to get her back.