Margaret "Maggie" Simpson is a fictional character in the animated television series The Simpsons. She first appeared on television in the Tracey Ullman Show short "Good Night" on April 19, 1987. Maggie was created and designed by cartoonist Matt Groening while he was waiting in the lobby of James L. Brooks' office. She received her first name from Groening's youngest sister. After appearing on The Tracey Ullman Show for three years, the Simpson family was given their own series on the Fox Broadcasting Company which debuted December 17, 1989.

Maggie is the youngest child of Marge and Homer, and sister to Bart and Lisa. She is often seen sucking on her pacifier and, when she walks, she trips over her clothing and falls on her face (this being a running gag, being used much more in earlier seasons). Being an infant, she cannot talk. Therefore, she is the least seen and heard in the Simpson family.

Maggie's squeaking and occasional speaking parts are currently provided by Nancy Cartwright, but she has also been voiced by guest stars James Earl Jones, Elizabeth Taylor and Jodie Foster, and by series regulars Yeardley Smith and Harry Shearer. Maggie has appeared in various media relating to The Simpsons – including video games, The Simpsons Movie, The Simpsons Ride, commercials and comic books – and has inspired an entire line of merchandise.

Stefani Joanne Angelina Germanotta (/ˈstɛfəniː dʒʌrməˈnɑːtə/ STE-fə-nee jurr-mə-NAH-tə; born March 28, 1986), known by her stage name Lady Gaga, is an American singer and songwriter. Born and raised in New York City, she primarily studied at the Convent of the Sacred Heart and briefly attended New York University's Tisch School of the Arts before withdrawing to focus on her musical career. She began performing in the rock music scene of Manhattan's Lower East Side, and was signed with Streamline Records by the end of 2007. During her employment as a songwriter for the record company, her vocal abilities captured the attention of recording artist Akon, who signed her to his label Kon Live Distribution.

Lady Gaga came to prominence as a recording artist following the release of her debut album The Fame (2008), which was a critical and commercial success that topped charts around the world and included the international number-one singles "Just Dance" and "Poker Face". After embarking on the The Fame Ball Tour, she followed the album with The Fame Monster (2009), which spawned the worldwide hit singles "Bad Romance", "Telephone" and "Alejandro". The album's success allowed her to embark on the eighteen-month long Monster Ball Tour, which later became one of the highest-grossing concert tours of all time. Her most recent album Born This Way (2011) topped the charts of most major markets and generated more international chart-topping singles, including "Born This Way", "Judas" and "The Edge of Glory". Besides her musical career, she involves herself with humanitarian causes and LGBT activism.