Katy Perry sports a Jersey Shore-inspired GTL shirt as she goes shopping in West Hollywood. The 25-year-old singer was joined by stylist Johnny Wujek and BFF Markus Molinari on her trip, making stops at the Fred Segal and Ron Herman boutiques! <br /><br />Earlier in the day, she was seen working out with celeb trainer Harley Pasternak. FYI: GTL stands for "gym, tan, laundry," the essential pre-party schedule for the Jersey Shore guys!<br /><br /><img alt="" src="/imagedata/2010/apr/katy.jpg" border="5" />

Katy Perry sports a Jersey Shore-inspired GTL shirt as she goes shopping in West Hollywood

Katy Perry does GTL

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Katy Perry does GTL

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