paragraph_text: The show had originally planned on having four judges following the Pop Idol format; however, only three judges had been found by the time of the audition round in the first season, namely Randy Jackson, Paula Abdul and Simon Cowell. A fourth judge, radio DJ Stryker, was originally chosen but he dropped out citing "image concerns". In the second season, New York radio personality Angie Martinez had been hired as a fourth judge but withdrew only after a few days of auditions due to not being comfortable with giving out criticism. The show decided to continue with the three judges format until season eight. All three original judges stayed on the judging panel for eight seasons.

paragraph_text: Pia Toscano (born October 14, 1988) is an American singer. Toscano placed ninth on the tenth season of "American Idol". She was considered a frontrunner in the competition, and her elimination shocked judges Randy Jackson, Jennifer Lopez, and Steven Tyler, all of whom were visibly and vocally upset. Some viewers and media outlets described Toscano's departure as one of the most shocking eliminations in "American Idol" history.

paragraph_text: Idols 4 was the fourth season of the Dutch version of Idols hosted by Martijn Krabbé & Wendy van Dijk and held in 2007-2008. The winner was Nikki Kerkhof, with Nathalie Makoma as runner up.

paragraph_text: Guest judges may occasionally be introduced. In season two, guest judges such as Lionel Richie and Robin Gibb were used, and in season three Donna Summer, Quentin Tarantino and some of the mentors also joined as judges to critique the performances in the final rounds. Guest judges were used in the audition rounds for seasons four, six, nine, and fourteen such as Gene Simmons and LL Cool J in season four, Jewel and Olivia Newton-John in season six, Shania Twain in season eight, Neil Patrick Harris, Avril Lavigne and Katy Perry in season nine, and season eight runner-up, Adam Lambert, in season fourteen.

paragraph_text: Dunkin 'Donuts replaced Snapple as sponsor of the show after three seasons. Four guest judges were invited to judge during the judge's cuts round: actor Neil Patrick Harris, singer Michael Bublé, actor Marlon Wayans and former judge Piers Morgan. This was the first season to have an all - male finale and the first where at least four magicians competed in the finals. Ventriloquist Paul Zerdin was voted the winner for the season on September 16, 2015. Comedian Drew Lynch was the runner - up, and magician Oz Pearlman came in at third place. Piff the Magic Dragon was named the most memorable act this season, or the fan favorite.

paragraph_text: Margaret Harshaw (12 May 1909 – 7 November 1997) was an American opera singer and voice teacher who sang for 22 consecutive seasons at the Metropolitan Opera from November 1942 to March 1964. She began her career as a mezzo-soprano in the early 1930s but then began performing roles from the soprano repertoire in 1950. She sang a total of 39 roles in 25 works at the Met and was heard in 40 of the Metropolitan Opera radio broadcasts. She was also active as a guest artist with major opera houses in Europe and North and South America.

paragraph_text: The eighth season of American Idol premiered on January 13, 2009, and concluded on May 20, 2009. Judges Simon Cowell, Paula Abdul, and Randy Jackson continued to judge the show's contestants, along with Ryan Seacrest as host. The season introduced Kara DioGuardi as the fourth judge on the Idol panel. It was also Abdul's final season as a judge. Kris Allen, a native of Conway, Arkansas, was announced the winner of the competition on May 20, 2009, defeating runner - up Adam Lambert after nearly 100 million votes. This was the second season where both of the final two contestants had been in the bottom three or two at least once before the finale, with the first being season three.

paragraph_text: Fox announced on May 11, 2015 that the fifteenth season would be the final season of American Idol; as such, the season is expected to have an additional focus on the program's alumni. Ryan Seacrest returns as host, with Harry Connick Jr., Keith Urban, and Jennifer Lopez all returning for their respective third, fourth, and fifth seasons as judges.

paragraph_text: Melinda Marie Doolittle (born October 6, 1977) is an American singer who finished as the third place finalist on the sixth season of "American Idol". Prior to her appearance on "American Idol", Doolittle worked as a professional back-up singer for, among others, Michael McDonald, Kirk Franklin, Aaron Neville, BeBe and CeCe Winans, Alabama, Jonny Lang, Vanessa Bell Armstrong, Carman, and Anointed.

paragraph_text: Aubrey Cleland is an American model and singer who came in 11th place on the twelfth season of "American Idol".

paragraph_text: The season set a record when 132 million votes were gathered for the finale. On May 23, 2012, Phillip Phillips became the winner of the eleventh season of American Idol, beating Jessica Sanchez, the first female recipient of the judges' save.

paragraph_text: The sixteenth season of American Idol premiered on March 11, 2018, on the ABC television network. It is the show's first season to air on ABC. Ryan Seacrest continued his role as the show's host, while Katy Perry, Luke Bryan, and Lionel Richie joined as judges. Maddie Poppe from Clarksville, Iowa won the season on May 21, 2018, while Caleb Lee Hutchinson was runner - up. In addition to being the first Iowan to win the competition, Poppe was the first female winner since Candice Glover in season twelve, the first female to beat a male in the finale since Jordin Sparks in season six and the first white female to win since Carrie Underwood in season four.

paragraph_text: "Dressin' Up" is a song by American singer Katy Perry from "" (2012). It was written by Perry, Christopher "Tricky" Stewart, Monte Neuble, and Matt Thiessen, and produced by Stewart and Kuk Harrell. Musically, "Dressin' Up" incorporates the styles of electro and dance-rock, along with a prominent electronic dance production. Lyrically, the song speaks of dressing up in different outfits for a lover, and contains multiple innuendos. "Dressin' Up" garnered mixed reviews from critics, some of whom complimented its "fun" sound, while others denounced it as being too similar to Perry's other works. Upon the release of "Teenage Dream: The Complete Confection", the song charted on the UK Singles Chart at number 109.

paragraph_text: Justin Guarini (born Justin Eldrin Bell; October 28, 1978) is an American singer / musician, actor, host and producer, who in 2002 was the runner - up on the first season of American Idol.

paragraph_text: The declining trend however continued into season eight, as total viewers numbers fell by 5–10% for early episodes compared to season seven, and by 9% for the finale. In season nine, Idol's six-year extended streak of perfection in the ratings was broken, when NBC's coverage of the 2010 Winter Olympics on February 17 beat Idol in the same time slot with 30.1 million viewers over Idol's 18.4 million. Nevertheless, American Idol overall finished its ninth season as the most watched TV series for the sixth year running, breaking the previous record of five consecutive seasons achieved by CBS' All in the Family and NBC's The Cosby Show.

paragraph_text: The fifth season of reality television singing competition American Idol began on January 17, 2006, and concluded on May 24, 2006. Randy Jackson, Paula Abdul and Simon Cowell returned to judge, and Ryan Seacrest returned to host. It is the most successful season to date ratings-wise, and resulted in 18 contestants (including all of the top 10 and a few semifinalists) getting record deals -- nine of them with major labels. It was the first season with a male winner (Taylor Hicks) and a female runner - up (Katharine McPhee). It was also the first season of the series to be aired in high definition.

paragraph_text: On February 14, 2009, The Walt Disney Company debuted "The American Idol Experience" at its Disney's Hollywood Studios theme park at the Walt Disney World Resort in Florida. In this live production, co-produced by 19 Entertainment, park guests chose from a list of songs and auditioned privately for Disney cast members. Those selected then performed on a stage in a 1000-seat theater replicating the Idol set. Three judges, whose mannerisms and style mimicked those of the real Idol judges, critiqued the performances. Audience members then voted for their favorite performer. There were several preliminary-round shows during the day that culminated in a "finals" show in the evening where one of the winners of the previous rounds that day was selected as the overall winner. The winner of the finals show received a "Dream Ticket" that granted them front-of-the-line privileges at any future American Idol audition. The attraction closed on August 30, 2014.

paragraph_text: American Idol is broadcast to over 100 nations outside of the United States. In most nations these are not live broadcasts and may be tape delayed by several days or weeks. In Canada, the first thirteen seasons of American Idol were aired live by CTV and/or CTV Two, in simulcast with Fox. CTV dropped Idol after its thirteenth season and in August 2014, Yes TV announced that it had picked up Canadian rights to American Idol beginning in its 2015 season.

paragraph_text: The eighth season of American Idol premiered on January 13, 2009, and concluded on May 20, 2009. Judges Simon Cowell, Paula Abdul, and Randy Jackson continued to judge the show's contestants, along with Ryan Seacrest as host. The season introduced Kara DioGuardi as the fourth judge on the Idol panel. It was also Abdul's final season as a judge. Kris Allen, a native of Conway, Arkansas, was announced the winner of the competition on May 20, 2009, defeating runner - up Adam Lambert after nearly 100 million votes. Kris Allen is the only married winner of the competition at the time of his victory. This was the second season where both of the final two contestants had been in the bottom three or two at least once before the finale, with the first being season three.

paragraph_text: The first season of American Idol premiered on June 11, 2002 (under the full title American Idol: The Search for a Superstar) and continued until September 4, 2002. It was won by Kelly Clarkson. That first season was co-hosted by Ryan Seacrest and Brian Dunkleman, the latter of whom left the show after the season ended.

Question: Which season of American Idol featured the singer of Dressin' Up as a guest judge?
Answer: season nine