Shocking secrets of Bachelorette contestant BRANDON ANDREEN may blow his chance to win DESIREE HARTSOCK sky high!

BACHELORETTE” contestant Bran­don Andreen hopes to win the heart of beautiful DEIREE HARTSOCK – but she might kick him to the curb when she discovers he’s hiding a “bombshell” secret.

As the ninth season of the hit ABC reality show made its debut on May 27 featuring “Bachelor” Sean Lowe castoff Desiree, The ENQUIRER has learned exclusively that one of her suitors was charged with making a bomb threat at a General Motors plant in 2005.

SHOCKING COURT DOCUMENTS reveal that 26-year-old Brandon was working as a telemarketer in Minnesota when he called the GM plant in nearby Wisconsin and identified himself as an FBI agent.

He told a worker that there was a briefcase in an elevator shaft, it contained a “highly explosive de­vice,” and the building needed to be evacuated immediately.

Bran­don was eventually charged with a felony but managed to strike a plea bargain, reducing the charge to a misdemeanor, and paid a fine of more than $1,000.

When contacted by The ENQUIRER, Brandon said: “I have no comment…It was all a misunderstand­ing.”

Compounding his problems, the 6-foot-1 hunk was busted for suspicion of driving under the influence in 2007 – and only a few months later was arrested for driving on a revoked license.

For the FULL STORY and to see the court documents – pick up the new ENQUIRER – now on sale!