335888
Exclusive It contents an exclusive interview with an international superstar , such as Sugababes , Zac Efron or Justin Bieber .
 Zac Efron, Justin Bieber
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Zac Efron, Justin Bieber