In an exclamation where Sunny might have otherwise said, "Oh my god," she said instead, "Oh my Lady Gaga." Thinking this was only her usage, I tried to track down who'd taught her the phrase. Apparently, she's not the only one saying it. According to some of the other Western teachers, this is fairly common usage, especially among the teenage students in our classes. And just now, in the process of writing this, I finally google it and see that I'm once again getting to such a usage pretty late.