One contestant on "So You Think You Can Dance" successfully squeezed tears out of Lady GaGa. The singer appeared as a guest judge on the Top 8 performance night and she cried after Marko Gremar did a contemporary piece to Jeff Buckley's "I Know It's Over" with Allison Holker.

All four judges gave Marko and Allison a standing ovation. GaGa was the first judge to give a comment. "I'm just so proud of you," she began as tears streamed down her face. "There are so, so many things I did wrong

Video: 'So You Think You Can Dance' Contestant Made Lady GaGa Cry