Miley Cyrus wears short shorts and heels while filling up her Porsche in Studio City, California on April 30, 2013. Credit: FAMEFLYNET

These are a few of Miley's favorite things? Miley Cyrus wore her umpteenth controversial outfit at a gas station in Studio City, Calif. on Tuesday, April 30. Showing off her seemingly endless legs in micro-short athletic shorts, Cyrus, 20, donned a black, oversized t-shirt emblazoned with the message "Sex, Drugs and Rap."

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Chatting on her cell phone as she filled up her Porsche Cayenne, the star -- who once covered Joan Jett's "I Love Rock and Roll" completed her eclectic look with a backwards red baseball cap and sexy, black-and-white strappy heels.

Despite her chipper mood and out-there outfit, things remain not-so-great between Cyrus and fiance Liam Hemsworth. "The wedding is not happening," a source tells Us of the couple, who've been for four years. Since returning from his solo trip to his native Australia, Hemsworth, 23, has "barely stayed with her" in L.A., a Hemsworth insider reveals.

"They've been off and on alot," the first insider says. "They're smart not to rush into marriage under those conditions."