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What was planned as a quiet stroll along the Thames River in London, England, turned into a paparazzi frenzy when Lady Gaga and Anderson Cooper met up for a "60 Minutes" interview in October 2010.
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For Gaga, the paparazzi and attention are nothing unusual. And as she told Cooper, she is a "master of the art of fame."
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After their stroll by the river and with several paparazzi in tow, Gaga and Cooper headed to a London pub, where they chatted over a couple of drinks.
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Gaga, whose real name is Stefani Germanotta, is actually a classically trained pianist and writes or co-writes all her songs. She insists she never lip synchs.
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When next met up with Lady Gaga in Milan, Italy, in December 2010, where she wore this rather revealing ensemble.
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One thing her fans - she calls them "little monsters" - may not know is that wherever she goes, she travels with a mobile recording studio.
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While in Milan, Gaga let Anderson Cooper hear a number of songs from her new album, "Born This Way."
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We met Gaga again in January 2011, when the pop star met Anderson Cooper in New York's Lower East Side.
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The plan was to visit Lady Gaga's old apartment, where she lived before hitting it big.
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Lady Gaga and Anderson Cooper, walking along Stanton Street in New York City's Lower East Side.
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Lady Gaga and Anderson Cooper, walking along Stanton Street in New York City's Lower East Side.
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Gaga's old apartment is located in a building on Stanton Street in New York City.
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But how do you get in if you don't have a key? Gaga says she was doing it the "New York way" - by hitting every buzzer in the building.
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The plan to get into the building worked, but not everyone was amused: the current tenant didn't want cameras in her apartment, and then someone called New York's Finest, the NYPD.
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The plan to get into the building worked, but not everyone was amused: the current tenant didn't want cameras in her apartment, and then someone called New York's Finest, the NYPD.
CBS/Richard Buddenhagen
Lady Gaga, Anderson Cooper and the "60 Minutes" team.