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Two other songs intended for the album ( which were written by Kerli , Toby Gad , and Lindy Robbins ) titled " I Feel Immortal " and " Skyscraper " were recorded by artists Tarja Turunen and Demi Lovato for their albums Unbroken ( 2011 ) and What Lies Beneath ( 2010 ) respectively , the latter song peaking at number ten on the Billboard Hot 100 .
 Kerli, Toby Gad, Lindy Robbins, Tarja Turunen, Demi Lovato
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Kerli, Toby Gad, Lindy Robbins, Tarja Turunen, Demi Lovato