The show's gimmick has always been to pluck talented young hopefuls from obscurity and make them into recording artists.
Besides Smithson, several of this year's semifinalists are not exactly rookies in the world of music. Kristy Lee Cook once had a deal with Arista Nashville, and rocker Robbie Carrico was part of the pop group Boyz N Girlz United.
Abdul added that Kelly Clarkson had pursued a recording career before her "Idol" win.
Now for the losers: Garrett Haley, Amy Davis, Joanne Borgella and Colton Berry were eliminated by viewers getting their first chance to vote in the top-rated talent contest's seventh season.
Haley, who sang "Breaking Up is Hard to Do," was the first one booted. Simon Cowell said Tuesday that the Elida, Ohio, resident looked like he had been locked in his bedroom for a month and needed some fresh air.
Abdul told the telegenic Davis, 25, from Lowell, Ind., that she needed more experience. "You're a beautiful, talented girl," she reassured.
Borgella, a 25-year-old plus-size model from Hoboken, N.J., failed to impress Cowell with her somewhat shrill rendition of "I Say a Little Prayer."
"It was a horrible song choice, and it wasn't a great performance," the acerbic judge said.
"I know I sing better than that," responded Borgella.
Cowell was especially harsh toward the 18-year-old Berry: "I would say get a good job, and enjoy singing. Because I don't think you'll make a successful career out of it."
Abdul and fellow judge Randy Jackson countered by scolding Cowell for discouraging Berry, then reassured the young singer he should pursue his dream.
Berry, from Staunton, Va., took the bad news in stride and closed the show with a spirited cover of "Suspicious Minds."
Thursday's show also featured a presentation of the music video for Abdul's first single in ten years, "Dance Like There's No Tomorrow." It's the lead single from Jackson's upcoming album, "Randy Jackson's Music Club - Vol. 1," which features 12 tracks from a wide-ranging group of artists including a duet from former "Idol" finalists Katherine McPhee and Elliot Yamin, and a gospel number featuring Bebe Winans and Mariah Carey.
Abdul's video of the breathy dance track drew a warm reception from the studio audience - and a smile and kiss on the cheek from Cowell.
"American Idol," now running three times a week, will return to a twice-weekly schedule March 11 for the elimination of the final dozen. The decision-making finale will be held in May.