1. Jamie Foxx
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Real Name: Eric Marlon Bishop
2. Katy Perry
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Real Name: Katy Hudson
3. Louis C.K.
Joe Corrigan / Getty Images
Real Name: Louis Szekely
4. Olivia Wilde
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Real Name: Olivia Jane Cockburn
5. Bruno Mars
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Real Name: Peter Gene Hernandez
6. Stevie Wonder
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Real Name: Steveland Judkins
7. Natalie Portman
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Real Name: Natalie Herschlag
8. Ben Kingsley
Frazer Harrison / Getty Images
Real Name: Krishna Pandit Bhanji
9. Tina Fey
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Real Name: Elizabeth Fey
10. Albert Brooks
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Real Name: Albert Einstein
11. Helen Mirren
Pascal Le Segretain / Getty Images
Real Name: Ilyena Lydia Vasilievna Mironov
12. Faith Hill
Frazer Harrison / Getty Images
Real Name: Audrey Faith Perry
13. Alicia Keys
Dimitrios Kambouris / Getty Images
Real Name: Alicia Augello Cook
14. Vin Diesel
Anthony Harvey / Getty Images
Real Name: Mark Sinclair Vincent
15. Calvin Harris
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Real Name: Adam Richard Wiles
16. Elton John
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Real Name: Reginald Kenneth Dwight
17. John Legend
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Real Name: John Rogers Stephens
18. Jack Black
Alberto E. Rodriguez / Getty Images
Real Name: Thomas Jacob Black
19. Miley Cyrus
Michael Loccisano / Getty Images
Real Name: Destiny Hope Cyrus
20. Michael Caine
Anthony Harvey / Getty Images
Real Name: Maurice Joseph Micklewite
21. Frank Ocean
Jason Merritt / Getty Images
Real Name: Christopher Edwin Breau
22. Diplo
Jason Merritt / Getty Images
Real Name: Thomas Wesley Pentz
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