07/17/2012 21:52

By Alyssa Toomey

Here's a simple math formula, folks: Twitter + Justin Bieber = Instant. Fame.  

Just ask Madison Beer—the latest undercover superstar who is now trending worldwide thanks to a couple tweets from the Biebs.

If you believe the Twitter hype, 13-year-old Beer is currently in talks to sign (or already has) with Scooter Braun—the talent manager who represents both Justin Bieber and Carly Rae Jepsen and is known for discovering the Biebs on YouTube.

So, exactly how did this Madison madness begin?!

With a little help from all 25 million of Justin's followers.

The social media-lovin' star tweeted this morning to all of his loyal Beliebers and posted a YouTube video of Madison singing Etta James' "At Last" to his Twitter page: