"This girl is on fire!" Is the lyric that comes to mind when I see model Cara Delevingne in her suit and tie for her latest campaign ad for DKNY. Look at this. 

No seriously, look at this. 

Actually I'm not really sure what's happening on the right. Don't get me wrong, Cara can do no wrong but Cara on the left is doing it all right.  Justin Bieber and Calvin Klein take note! This is how you shoot sexy.