It's an unreal feeling to even type that subject line. Whitney Houston has had one of the most profound impacts on singers today, including the American Idols. Her vocals are unmatchable, as judge Randy Jackson always advises the Idol contestants to avoid singing a song by the big three: Whitney, Mariah, and Celine.

Many contestants have performed her songs on American Idol, including during auditions this season, or list her as an inspiration.

Idol Performances
Trenyce, Season 2 initial audition, "I Learned From The Best"
Trenyce, Season 2 Top 11, "I Have Nothing"
Leah LaBelle, Season 3 initial audition, "I Believe in You and Me"
Leah LaBelle, Season 3 Semifinals, "I Have Nothing"
Jasmine Trias, Season 3 Semifinals, "Run To You"
Jennifer Hudson, Season 3 Top 8, "I Have Nothing"
Jasmine Trias, Season 3 Top 3, "Saving All My Love For You"
Vonzell Solomon, Season 4 Hollywood, "How Will I Know"
Vonzell Solomon,Season 4 Top 10, "I Have Nothing"
Lisa Tucker, Season 5 initial audition, "One Moment In Time"
Katharine McPhee, Season 5 Top 6, "I Have Nothing"
Haley Scarnato, Season 6 Top 20, "Queen of the Night"
Sabrina Sloan, Season 6 Top 20, "All the Man That I Need"
LaKisha Jones, Season 6 Top 16, "I Have Nothing"
Melinda Doolittle, Season 6 Top 3, "I Believe in You and Me"
Asia'h Epperson, Season 7 Top 20, "I Wanna Dance With Somebody"
Syesha Mercado, Season 7 Top 16, "Saving All My Love For You"
Carly Smithson, Season 7 initial audition, "I'm Every Woman"
David Archuleta, Season 7 Top 7, "When You Believe"
Tatiana Nicole Del Toro, Season 8 Semifinals, "Saving All My Love For You"
Siobhan Magnus, Season 9 Top 7, "When You Believe"
Karen Rodriguez, Season 10 initial audition, "You Give Good Love"
Ashthon Jones, Season 10 final audition, "I Wanna Dance With Somebody"
Haley Reinhart, Season 10 Top 12, "I'm Your Baby Tonight"
Pia Toscano, Season 10 Top 12, "Where Do Broken Hearts Go"

Whitney as an Inspiration
Jennifer Hudson listed "I Believe In You and Me" as one of the songs she loves to sing. Randy Jackson has produced music for Whitney. Syesha Mercado, Kristy Lee Cook, Katie Stevens, Ashley Rodriguez, and Ashthon Jones said Whitney Houston was one of their musical influences. Kimberley Locke, Trenyce, Ayla Brown, Lisa Tucker included Whitney in their favorite artists. Trenyce's favorite song to sing is "I Will Always Love You," and Diana DeGarmo and Trenyce compared their styles to Whitney's. Jacob Lusk's dream song to sing is "I Will Always Love You" and if he could perform with anyone he said he'd perform with her.

Tweets of Tribute
Everyone on Twitter has been talking about the unexpected passing of a music icon, including some of our Idol alumni.

@ImChrisRich Stunned and saddened ...RIP Whitney Houston ....U left behind a greatness that is unmatchable. Thank You for Sharing your gift with Us.

@DianaDeGarmo My heart truly hurts with the news of Ms. Houston's passing... I send all of my love & prayers to her family, friends, and fans.

@RubenStuddard I just can't believe Whitney is gone. What an amazing voice. Rest In Peace Whitney I will Always Love You!!!!!!

@andrewagarcia R.I.P Whitney Houston, her voice was the most angelic voice I've ever heard.

@clayaiken RIP Whitney Houston. The soundtrack of so many lives. I'm sure Heaven reverberates 2nite with the sound of ur voice. It always was angelic.

@trenyce I feel like I've had the Wind knocked out of me...Whitney died???!!! Any1 who knows me, knows she was my reason for singing! This is HARD!

Although Whitney Houston has passed, her music and legacy will live on. Thank you Whitney for your contribution to music.