I Tawt I Taw a Putty Tat is an 2011 CGI-short starring Tweety & Sylvester. It aired alongside Happy Feet Two.
It features the voices of Mel Blanc, and June Foray. Voice archive was taken from Mel Blanc's recordings in Capital Records, specifically that of the song I Tawt I Taw a Putty Tat since Mel died in the late 80's.
A series of gags depicting Sylvester attempt to capture Tweety.