Question: In 2004 Hilary Duff starred with her older sister in the movie In Search of Santa, they also starred together in Hilary's show Lizzie McGuire, when her sister played what character?

Context paragraphs:
Lizzie McGuire (soundtrack): Lizzie McGuire is the soundtrack to the television series of the same name.  The album is a collection of hits by various artists, used as background music in the show or inspired by it.  It also includes the show's theme song and a song by Hilary Duff, the actress who plays Lizzie.  This was Hilary's music debut.  It has sold 1,000,000 copies in the U.S and was certified Platinum by the RIAA.

In Search of Santa: In Search of Santa is a 2004 CGI family film starring Hilary Duff and her older sister Haylie Duff in their first voice roles.  It was directed by William R. Kowalchuk and released on November 23, 2004.

The Lizzie McGuire Movie: The Lizzie McGuire Movie is a 2003 American teen comedy film released by Walt Disney Pictures on May 2, 2003.  The film serves as the finale of the Disney Channel television series of the same name, and was the first theatrical film based on a Disney Channel series.  The film stars Hilary Duff, Adam Lamberg, Robert Carradine, Hallie Todd and Jake Thomas, and tells the story of Lizzie's graduation trip to Rome.  At its release, the film peaked at number two at the domestic box office behind "X2: X-Men United".  "The Lizzie McGuire Movie" was released on August 12, 2003 on VHS and DVD.  "The Lizzie McGuire Movie" was directed by Jim Fall.

List of Lizzie McGuire episodes: The following is a list of episodes of "Lizzie McGuire", a television comedy series that was broadcast on the Disney Channel, an American satellite and cable network aimed at children.  The series originally aired from January 12, 2001 to February 14, 2004.  The show was created by Terri Minsky and produced by Stan Rogow.  The show's target demographic was preteen and teenagers, and was a ratings hit, drawing in 2.3 million viewers per episode.  Production was completed in 2002 after the show fulfilled its 65 episode order.  The success of the television series led Disney Channel to produce a feature film spin-off based on the show, titled "The Lizzie McGuire Movie".

Hilary Duff: The Concert – The Girl Can Rock: Hilary Duff: The Concert – The Girl Can Rock, commonly referred to as simply The Girl Can Rock, is the first live video album by American recording artist Hilary Duff, released on August 10, 2004 by Hollywood Records.  It contains a full concert from Ventura Theatre, Ventura, California and an accompanying music video for her single "Come Clean".  Some special features of the DVD include Duff's appearance with Ryan Seacrest and her getting her first surfing lesson.  In addition, the DVD contains footage of Duff recording "Crash World" and an interview with Duff discussing her self-titled album, "Hilary Duff".  Duff's DVD won the DVDX Award for Best Overall DVD in the Music Program.  The DVD was nominated for the home video VSDA Award.  The album was also certified four times platinum in Canada by Canadian Recording Industry Association (CRIA).

Haylie Duff: Haylie Katherine Duff (born February 19, 1985) is an American actress, singer, songwriter, television host, writer, and fashion designer.  She is best known on her role as Sandy Jameson in the television series "7th Heaven", Amy Sanders on "Lizzie McGuire", Summer Wheatley in "Napoleon Dynamite", and Annie Nelson in the made-for-television films "Love Takes Wing" along with its sequel "Love Finds a Home" (2009).

Hilary Duff: Hilary Erhard Duff (born September 28, 1987) is an American actress and singer.  Duff began her acting career at a young age, and quickly became labeled a teen idol as the title character of the Disney Channel comedy series "Lizzie McGuire" (2001–2004).  The series proved to be a hit, leading to a film adaptation of the series to be released.  Duff began working on numerous projects with the Disney Channel, including the film "Cadet Kelly" (2002).  She later began work on an album, releasing the Christmas themed "Santa Claus Lane" (2002) through Walt Disney Records.  Upon signing with Hollywood Records, Duff began working on her second studio album, "Metamorphosis" (2003).  The album achieved critical and commercial success, topping the U.S. "Billboard" 200 and selling over three million copies in the nation.  It also found success in both Canada and Japan.  Duff's success in both acting and music led to her becoming a household name, with merchandise such as dolls, clothing, and fragrances being released.

Hilary Duff: All Access Pass: Hilary Duff: All Access Pass is the first video album by American recording artist Hilary Duff, released on November 4, 2003 by Buena Vista and Hollywood Records.  Directed and produced by Virgil P. and Tess Gallagher Thompson, the hour-long DVD features the music videos for Duff's songs "So Yesterday", "Why Not" and "I Can't Wait".  "All Access Pass" also features behind-the-scenes videos of the former two music videos and her second studio album "Metamorphosis" (2003), and a live performance from Duff at Sessions@AOL.  Duff has stated that the DVD also documents her two-year musical journey leading up to the release of "Metamorphosis".  To date, it has been certified double platinum in the United States and five-times platinum in Canada.

Why Not (song): “Why Not” is a song recorded by American actress and singer Hilary Duff for the soundtrack of the 2003 comedy film, "The Lizzie McGuire Movie," which was produced and released at the time when Duff was starring as the title character of the Disney comedy series "Lizzie McGuire."  Its lyrics were written and its music was composed by Charlie Midnight, who collaborated on both with the song's music producer, Matthew Gerrard.

Hilary Duff (album): Hilary Duff is the self-titled third studio album by American singer Hilary Duff.  It was released on September 29, 2004, shortly after her seventeenth birthday, by Hollywood Records.  Duff cited the album as being more mature than her previous albums, stating "Basically, I'm not Lizzie McGuire anymore".  The seventeen-track album saw Duff collaborating with the same producers she did on "Metamorphosis", saying that it was more comfortable for her that way.  Recording sessions for the album took place during May to August 2004, partially between filming of "Raise Your Voice" (2004) and "The Perfect Man" (2005), both in which Duff had starring roles.

Supporting paragraphs: In Search of Santa Haylie Duff
Answer: Amy Sanders