American Idol season 21, episode 4 will air on ABC on Sunday, March 12 at 10:30 pm ET, after the Oscars. The episode will feature a new round of singers giving auditions and trying to qualify for the Hollywood Week round.24-year-old Hannah Nicolaisen is from Houston, Texas. She is an alumnus of the University of Illinois and performs live music in Montgomery, Alabama.American Idol auditionee Hannah Nicolaisen aspires to get a master's degree in psychology View this post on Instagram Instagram PostHannah Nicolaisen is a University of Illinois alumnus who plays live music in Montgomery, Alabama.Hannah used to play Division 2 volleyball at the University of Illinois Springfield, from where she graduated with a degree in Exercise Science IN 2022. Nicolaisen was the director of TEDxUofISpringfield and the Career Peer Student Mentor when she was in college. Hannah quit her 9 to 5 job as an IT recruiter to become a musician. She said in a video:"I feel like I’m trying to trust my gut a lot. That’s been the theme of the last several months … There’s been some really cool doors and opportunities that have opened up."Before transferring to the University of Illinois, Hannah studied physics, engineering, and mathematics at Cowley College and Cypress Woods High School in Kansas. Hannah wants a master’s degree in psychology and got engaged to Matheus Telles in December 2022.Nicolaisen has not released any original music but has uploaded some videos of her songs, like "Chariot," on YouTube and TikTok.Other auditionees of American Idol season 21, episode 4 View this post on Instagram Instagram PostThe following singers will perform in front of judges Lionel Richie, Katy Perry, and Luke Bryan to earn a spot in the competition and ultimately win a $250,000 cash prize. The qualifiers for the audition round will get a Hollywood Week. One lucky performer might even be awarded a platinum ticket, enabling them to select their duet partner and skip Hollywood Week's opening round.Amara Valerio: A soulful pop singer and student at Cornell University from Yonkers, New YorkCay Aliese: Soul singer-songwriter and graphic designer from TennesseeColt Glover: Country singer and student at the Oklahoma State UniversityDany Epp: Social media singer from Suffern, New YorkRach Lux Karma: metal singer from NewingtonReette Thorns: Grand Valley State University student from Madison, WisconsinSavanna Christian Gainey: Elementary school teacher from Florence, South CarolinaTripp Taylor: Throwback singer and Carnegie-Mellon student from Florence, South CarolinaSelected American Idol season 21 contestantsThe following contestants have been selected for the Hollywood Week round of American Idol:Adin Boyer from Lake ForestAiden Adair from CloverAlessandra Aguirre from LimaAshley Tankard from DurhamBre Podgorski from BurbankCaroline Kole from HoustonElijah McCormick from RaefordEmma Busse from VancouverHaven Madison from ClarksvilleJeverson from GrenadaJon Wayne Hatfield from GoshenKaylin Hedges from Pound RidgeKeelin from West IslipLyric Medeiros from HonoluluKya Monee from AustinLucy Love from Holly GroveMegan Danielle from DouglasvilleMarybeth Byrd from ArmorelMatthew Wilson from BuffaloMcKayla Stacey from AndoverMichael Williams from MasonNutsa Buzaladze from TbilisIOlivia Soli from Los AngelesPreston Duffee from HartsvilleSara Beth from RosevilleStefan Benz from JohannesburgTanner Charles from Broken ArrowTrey Louis from Santa FeTyson Venegas from VancouverWe Ani from HarlemWilliam Tongi from KahukuColin Stough from AmoryZachariah Smith from AmoryAmerican Idol airs on ABC every Sunday at 8 pm ET.