Chris Brown will rot behind bars until June -- at the very least -- because the singer's latest bid for freedom was just DENIED.
Brown will soon be flown back to L.A. -- where he'll remain in jail until June ... at the very least. It looks like he'll be flown back to D.C. on Con air ... a trip way worse than economy.
The stakes are high ... if Brown is convicted in D.C. ... the judge in the Rihanna case could violate his probation and sentence Brown to four years in PRISON.
While his single is smashing 
