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Rex Features
According to Contactmusic, the Dead Weather frontman said that the 'If U Seek Amy' star does not pretend to be anything other than a pop singer.
He stated: "I don't know if Bob Dylan and Tom Waits are as authentic as I think they are. Perhaps they're not.
"Sometimes you start thinking that maybe Britney Spears or someone like that who's doing exactly what they want to do in the way that they best know how, is more authentic than any of those people you could mention."
The 34-year-old, who was speaking at a guest lecture for Dublin's Trinity College, also revealed that he had a great time working on rock documentary It Might Get Loud with Led Zeppelin's Jimmy Page and U2's The Edge.
He told the audience: "It was a pretty incredible experience to work with those two guys."
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