LOS ANGELES (AP) - Alex Preston comes just short of becoming the next "American Idol." He was eliminated in last night's show. That leaves Jena (JEE'-nah) Irene and Caleb Johnson for the finals. Had things been just a little different, neither Irene nor Johnson would be there. Irene was not initially a finalist but she was chosen as a wild card for the top 13. Johnson had tried out for "Idol" twice before this year, in 2011 and in 2012. He made it as far as Hollywood Week before getting cut both times. Ryan Seacrest also revealed guest performers for next week. Preston will perform with Jason Mraz, Irene will sing with Paramore and Johnson will perform with Kiss.