The semifinals of Season 9 of American Idol comprised of twenty-four singers. It started on February 25th, 2010 and ended March 11th, 2010. This was the first round of the season where America could vote.
The theme for all three rounds is "Billboard Hot 100".
Top 12 Girls Edit
|Paige Miles||"All Right Now" (Free)||Safe|
|Ashley Rodriguez||"Happy" (Leona Lewis)||Eliminated|
|Janell Wheeler||"What About Love" (Heart)||Eliminated|
|Lilly Scott||"Fixing a Hole" (The Beatles)||Safe|
|Katelyn Epperly||"Oh! Darling" (The Beatles)||Safe|
|Haeley Vaughn||"I Want to Hold Your Hand" (The Beatles)||Safe|
|Lacey Brown||"Landslide" (Fleetwood Mac)||Safe|
|Michelle Delamor||"Fallin'" (Alicia Keys)||Safe|
|Didi Benami||"The Way I Am" (Ingrid Michaelson)||Safe|
|Siobhan Magnus||"Wicked Game" (Chris Isaak)||Safe|
|Crystal Bowersox||"Hand in My Pocket" (Alanis Morissette)||Safe|
|Katie Stevens||"Feeling Good" (Cy Grant)||Safe|
Eliminated: Ashley Rodriguez, Janell Wheeler
Top 12 Guys Edit
|Todrick Hall||"Since U Been Gone" (Kelly Clarkson)||Safe|
|Aaron Kelly||"Here Comes Goodbye" (Rascal Flatts)||Safe|
|Jermaine Sellers||"Get Here" (Brenda Russell)||Safe|
|Tim Urban||"Apologize" (OneRepublic)||Safe|
|Joe Muñoz||"You and I Both" (Jason Mraz)||Eliminated|
|Tyler Grady||"American Woman" (The Guess Who)||Eliminated|
|Lee DeWyze||"Chasing Cars" (Snow Patrol)||Safe|
|John Park||"God Bless the Child" (Billie Holiday)||Safe|
|Michael Lynche||"This Love" (Maroon 5)||Safe|
|Alex Lambert||"Wonderful World" (James Morrison)||Safe|
|Casey James||"Heaven" (Bryan Adams)||Safe|
|Andrew Garcia||"Sugar, We're Goin Down" (Fall Out Boy)||Safe|
Eliminated: Joe Munoz, Tyler Grady
Top 10 Guys Edit
|Michael Lynche||"It's a Man's Man's Man's World" (James Brown)||Safe|
|John Park||"Gravity" (John Mayer)||Eliminated|
|Casey James||"I Don't Want to Be" (Gavin DeGraw)||Safe|
|Alex Lambert||"Everybody Knows" (John Legend)||Safe|
|Todrick Hall||"What's Love Got to Do With it" (Tina Turner)||Safe|
|Jermaine Sellers||"What's Going On" (Marvin Gaye)||Eliminated|
|Andrew Garcia||"You Give Me Something" (James Morrison)||Safe|
|Aaron Kelly||"My Girl" (The Temptations)||Safe|
|Tim Urban||"Come On Get Higher" (Matt Nathanson)||Safe|
|Lee DeWyze||"Lips of an Angel" (Hinder)||Safe|
Eliminated: John Park, Jermaine Sellers
Top 10 Girls Edit
|Crystal Bowersox||"Long As I Can See the Light" (Creedence Clearwater Revival)||Safe|
|Haeley Vaughn||"The Climb" (Miley Cyrus)||Eliminated|
|Lacey Brown||"Kiss Me" (Sixpence None the Richer)||Safe|
|Katie Stevens||"Put Your Records On" (Corinne Bailey Rae)||Safe|
|Didi Benami||"Lean on Me" (Bill Withers)||Safe|
|Michelle Delamor||"With Arms Open Wide" (Creed)||Eliminated|
|Lilly Scott||"A Change is Gonna Come" (Sam Cooke)||Safe|
|Katelyn Epperly||"The Scientist" (Coldplay)||Safe|
|Paige Miles||"Walk Away" (Kelly Clarkson)||Safe|
|Siobhan Magnus||"Think" (Aretha Franklin)||Safe|
Eliminated: Haeley Vaughn, Michelle Delamor
Top 8 Girls Edit
|Katie Stevens||"Breakaway" (Kelly Clarkson)||Safe|
|Siobhan Magnus||"House of the Rising Sun"||Safe|
|Lacey Brown||"The Story" (Brandi Carlile)||Safe|
|Katelyn Epperly||"I Feel the Earth Move" (Carole King)||Eliminated|
|Didi Benami||"Rhiannon" (Fleetwood Mac)||Safe|
|Paige Miles||"Smile" (Charlie Chaplin)||Safe|
|Crystal Bowersox||"Give Me One Reason" (Tracy Chapman)||Safe|
|Lilly Scott||"I Fall to Pieces" (Patsy Cline)||Eliminated|
Eliminated: Katelyn Epperly, Lilly Scott
Top 8 Guys Edit
|Lee DeWyze||"Fireflies" (Owl City)||Safe|
|Alex Lambert||"Trouble" (Ray LaMontagne)||Eliminated|
|Tim Urban||"Hallelujah" (Leonard Cohen)||Safe|
|Andrew Garcia||"Genie in a Bottle" (Christina Aguilera)||Safe|
|Casey James||"You'll Think of Me" (Keith Urban)||Safe|
|Aaron Kelly||"I'm Already There" (Lonestar)||Safe|
|Todrick Hall||"Somebody to Love" (Queen)||Eliminated|
|Michael Lynche||"This Woman's Work" (Kate Bush)||Safe|
Eliminated: Alex Lambert, Todrick Hall
- Originally, the females were scheduled to perform first during the second week, but a sudden medical issue with Crystal Bowersox due to complications from diabetes required the boys to perform first.
- The Top 24 sang "American Boy" by Estelle, ft. Kanye West during the first week results show.
- Allison Iraheta and Kris Allen sang "Scars" and "Let it Be" respectively during the Top 24 results show.
- Allen's performance was made available for download on iTunes with all the proceeds going to Haiti charities.
- The Top 20 sang "I Gotta Feeling" by Black Eyed Peas during the second week results show.
- Danny Gokey sang "My Best Days Are Ahead of Me" during the Top 20 results show.
- The Top 16 sang "Haven't Met You Yet" by Michael Buble during the third week results show.
- Matt Giraud and Scott MacIntyre sang "Tell Her About It" during the Top 16 results show.