Katy Perry Videos: Katy Perry sing her new song 'Good-Bye 'Chuck': Let's just say that Chuck does not have the monopoly on Yvonne Strahovski's ability to be funny. The Chuck star appears in a CollegeHumor video released yesterday. The video features a rather energetic vision of Yvonne Strahovski singing and dancing her way into what may be Internet meme history.

This would be a new direction for the actress, who plays the supremely confident and kickass secret agent Sarah Walker on Chuck. For one thing, her blonde hair is absolutely nowhere to be seen (replaced by multiple wigs, one of them purple). For another, she sings. I won't argue the possibility of heavy producing and a bit of auto-tuning, but there is definite talent on display here. Funny, funny talent.

The video, entitled "Three Pop Stars, One Song" is a disturbingly-catchy dissection of the various pop star "types" out there. Or maybe just the types embodied by Katy Perry, Ke$ha and Lady Gaga. The result is both scary and hilarious.