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While recording the track " If It 's Lovin ' That You Want " for her debut album , Rihanna received a visit from American singer Ne-Yo , in which they met for the first time , although they never got the chance to collaborate on " Music of the Sun " .
 Rihanna, Ne-Yo
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Rihanna, Ne-Yo