Co-co-co-cover songs. Co-co-cover songs.
Y'know, it's weird, but I don't think I've actually heard the Lady Gaga version of "Poker Face." The first I heard was Molly Lewis's cover. I then saw Cartman and the South Park Gang playing it on Rock Band. After that, I saw George Hrab singing a bit for the Boston Skeptics (at about 50 minutes, oh wait, that's "Single Ladies," which I've also never heard the original of, although I really like the Pomplamoose version a lot). Oh, and then of course, the imitable Mr. Walken's version.