What about the horrible song by Akon (feat. Eminem) "Smack That":
"Wanna jump in my Lamborghini Gallardo" - which he pronounces as "Gah-Lah-Doe".

Bah!

So many great ones to list here, but let's start with the obvious. A name I think shouldn't go on being butchered by Americans: Jaguar.
I've heard Jag-WAR just about all of my life. I originally thought it was because I grew up in Atlanta, where pronunciations are commonly slaughtered (i.e., Oil = "Oll", Toilet =…