Pop superstar Lady Gaga has signed on to make her motion picture debut playing a character named La Chameleon in a Robert Rodriguez film titled "Machete Kills."  Rodriguez announced the news on Twitter yesterday, and included a link to a poster of Gaga's character in the film, which can be seen below.  The film is actually a sequel to the 2010 film "Machete," and stars Jessica Alba, Michelle Rodriguez, Danny Trejo, Mel Gibson, Charlie Sheen, and many more.  The film is tentatively slated for an early 2013 release.