ABCNews -- Lady Gaga had to know this was coming: With a hit as infectious as "Poker Face," parodies are pretty much a given. Gaga's song, which has reached No. 1 status in almost 20 countries, remains a pop culture anthem more than a year after its September 2008 release. It's bumped in clubs and at the gym; it's hummed by celebrities and common folk. And, of course, it has inspired a host of imitators. Below, check out five of the greatest TV and Internet takeoffs on the dance ditty du jour, "Poker Face": But, first, if you've never heard the original, CLICK HERE to find out what's inspired dozens of imitators. 1. Christopher Walken's Poetic Reading of "Poker Face" Christopher Walken gave Gaga's work the dramatic treatment only an Oscar-winning...