![](https://cdn.statically.io/img/imagez.tmz.com/image/97/4by3/2010/06/17/97d07f4d97c551ed9f7565bb20a97972_md.jpg)
Cops in Maryland hit a local bar this weekend after receiving a call from someone claiming 16-year-old Justin Bieber was inside boozing -- but what they found ... was a woman who looked just like him.
![](https://cdn.statically.io/img/imagez.tmz.com/image/c9/o/2010/06/16/c973ca30e22b532cb6e7254ff0b44be0_md.jpg)
TMZ spoke with multiple people inside the "Mug and Mallet" bar in Ocean City who confirm that cops entered on Saturday night looking for an underage drinker with a bowl haircut and a tiny frame.
But the only person who fit that description was a 27-year-old woman named Katie.
Katie tells us she had to whip out ... her ID and prove she wasn't JB -- though she says she gets mistaken for the singer, "all the time!"
If only the cops would've checked the real Bieber's Twitter page -- they would have known he was in The Bahamas with Kim Kardashian.
![](https://cdn.statically.io/img/imagez.tmz.com/image/aa/o/2010/06/13/aa43523bd9085c95a89273fc10a5ceec_md.jpg)
More Justin Bieber
![](https://cdn.statically.io/img/imagez.tmz.com/image/ac/16by9/2012/04/24/acf5cf44e7d054c68048a3bb82daf6d7_xs.jpg)
Kim K and Bieber -- Bum Rushed by 12-Year-Old
ncG1vNJzZmivp6x7tbnZZ5qopV9nfXJ8jmltaGlnZLe2v9OipWaamZqvpr6Mnamippueu6h5wqinrGWdlr%2B6uMCnm2aakad6uLvMmqVmo5GptqZ51KebnqqRnLJuvM6loJydXw%3D%3D