Lady Gaga 'Flirts' with Joseph Gordon-Levitt in Sexy Thong during MTV VMAs [VIDEO] Boyfriend Taylor Kinney Jealous?

Lady Gaga totally rocked it with her opening performance at the 2013 MTV VMAs:

Turns out that Mother Monster flaunted that racy seashell-inspired wardrobe throughout the entire event. She even innocently flirted with "Don Jon" actor, Joseph Gordon-Levitt... in all her bare-booty glory:

The "Applause" songstress is currently in a serious relationship with "Chicago Fire" hottie Taylor Kinney, so it's not like Gaga and Gordon-Levitt are about to start dating or anything. But still, wonder if the 32-year-old "(500) Days of Summer" star enjoyed the view? Especially after Gaga's adorable twirl!