Newt Gingrich -- Sorry I Stole 'Eye of the Tiger'

Newt Gingrich -- Sorry I Stole 'Eye of the Tiger': Newt Gingrich has officially vowed never to use the song "Eye of the Tiger" in ANY of his 2012 campaign materials ever again -- which means a lot ... because his 2012 campaign has already been dead an entire week.TMZ broke the story ... Newt was…