Only one song by The Weeknd has been anything like a hit: “Crew Love,” off Drake’s hugely popular Take Care. Yet they — well, he, a performer/producer from Toronto named Abel Tesfaye — nevertheless headlined a $32-a-ticket show with no opening act and no merchandise in sight at the act’s first-ever Philly performance. The air filled with iPhones when Diddy was spotted in the wings. The TLA crowd, about three men to every woman, knew every word of “Crew Love” on Sunday night. They didn’t do badly with the mysterious R&B singer’s three (!) 2011 “mixtape” bows, either. The audience sang in counterpoint on the bare-bones encore “Wicked Games” and brought to life the cutup “whoa” breaks in the Siouxsie Sioux-sampling “House of Balloons/Glass Table Girls.” Without the benefit of his production work on the recordings, Tesfaye’s dirtier lyrics lost some of their authentic punch. Still, the crowd sang back to him his filthiest scenarios while couples swayed. “I’ve got Philadelphia speaking French,” the Toronto-based Tesfaye claimed excitedly before launching into “Montreal,” one of his smoother ventures.