Michaela Rehle/Landov
August 29, 2011 10:00 AM

Katy Perry also celebrated post-VMAs Sunday night, popping into Morton’s The Steakhouse in Beverly Hills to thank record label executive Greg Thompson, who was at the restaurant having dinner. The double winner only stayed for a few minutes, but stopped to take pictures with fans and was extremely friendly to the staff and fellow guests, a source tells PEOPLE.

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