Nick Cannon I'm Praying For My Jewelry Impostor

11/18/2013 10:10 AM PST

Nick Cannon
says he's praying for the S.O.B. who stole thousands of dollars worth of jewelry from Fred Segal using his good name.

Nick says he wasn't surprised a clerk from Fred Segal stupidly brought a bag of jewels to the Roosevelt Hotel in Hollywood ... handing it over to a security guard who said he worked for Nick.  Of course, the jewels were never heard from again.

Fact is ... Nick says he's no stranger to celebrity thefts.  Check out the video.