Every once in awhile, we stumble across a person (or, in some cases, a cartoon) that bears an uncanny resemblance to one of our favorite celebs! We couldn't resist putting the look-alikes side-by-side for the ultimate "made you look twice" moments.

Lady Gaga channeling a 'Harry Potter' character? Miley Cyrus resembling a Disney villain? Justin Bieber rocking similar features to those of an Oscar-winning actress? Yep, they're all in here. Check out the ultimate celeb look-alikes in the gallery above!