'Chuck's' Yvonne Strahovski rolls Katy Perry, Ke$ha, Lady Gaga and Justin Bieber into one creepy video

Yvonne-Strahovski-Katy-Perry.jpgIt's a stretch from her role as CIA Agent Sarah Walker on NBC's "Chuck," but Yvonne Strahovski makes a pretty convincing pop-tart in this College Humor video.
 
Photo/Video credit: CollegeHumor.com