K-Pez is such a fan girl, in fact, that she just HAD TO barge Little Mix's Perrie Edwards out the way to hug the Biebs.
The "Chained To The Rhythm" singer hugs Perrie then moves her out to the way to get to JB.
“How are you?,” Justin asks as Katy wraps her arms around him.
“I’m so happy you’re here,” she replies.
The awkward and uncomfortable expression on his face says it all!
Check out the bizarre exchange below...