TONY BENNETT and LADY GAGA have released the video for "The Lady Is a Tramp", their duet from Tony's new album, "Duets 2".  It's similar to Tony's previously released "Body and Soul" with AMY WINEHOUSE . . . in that the video is Tony and Lady Gaga performing the song together in a studio.     In fact, the main difference is that Amy wasn't wearing the aqua-colored wig that Lady Gaga is.