Busted! Mariah Yeater's Incriminating Text!

Another day, another setback for Mariah Yeater and her quest to get some of that sweet Bieber cash.

TMZ announced today that they received incriminating text messages from a friend of Yeater's proving that not only is Justin Bieber NOT the father, but the whole thing was just a baseless attempt to extort money out of the pint-sized pop star.

In the text, Yeater asks the unnamed friend to delete old texts from her mom saying her son Tristyn is actually her ex-boyfriend's child, even offering a kickback to keep things quiet.

Talk about a low-down stunt for publicity and a few dollar bills.