Here's a teaser for this week's host and musical guest, with a midweek sketch and read-thru coming on Wednesday, on-stage promos on Thursday, and maybe (just maybe) a few surprises in between: NBC's ...

This week's 'Skim: Snapchat will bring live video to its app for the first time (but you shouldn't get excited); Facebook to ease access to Facebook Watch; Snapchat launches e-commerce store so you ...