Quirky pop star Lady Gaga has added real tears and shoe throwing to her attention-grabbing repertoire this week, even though she wasn't the one performing. The ' Born This Way ' singer was moved to tears as she watched two contestants performing during the US TV-show 'So You Think You Can Dance.' Appearing as a guest judge on the show, Gaga (aka Mother Monster to fans), was overcome with emotion when dancers Marko and Allison performed their routine to Jeff Buckley's 'I Know It's Over,' as it reminded her of her youth. Gaga told the performers: "I'm just so proud of you. You really love to dance. There were so many things I did wrong when I was younger and so many things I wish I could take back. "I felt every moment of that in your dance tonight. You are absolutely incredible. Whether you are number one, three or ten, you have it," she added. And what of the shoe throwing? Gaga was so impressed by performers Sasha and Me...