How do I get push notifications of a specific user on Twitter? I heard someone mentioning you can be notified when a specific Tweeter start tweeting...but I haven't been able to find a tool that does this.  What is the way to do this without following them?

OS: 4.1
S3
Follow them, then go to their profile and star them (it's next to the follow button).

You'll now get notifications whenever they tweet.