What is 2010's worst Lady Gaga ripoff?
In the brown corner: Cascada with their new single 'Pyromania'. httpv://www.youtube.com/watch?v=EsdXPPp8dNk Also in the brown corner: Jason Derulo with 'In My Head'. httpv://www.youtube.com/watch?v=LU-ZQWZSGfc We'd have to say Cascada win this one. Not…