Justin Bieber’s love interest in his new music video “BOYFRIEND” wants the beliebers to know she’s NOT a threat … ’cause she’s already got a husband.

TMZ spoke with Rachel Barnes and she says the chemistry between the two was “only for work.”

“Justin and Selena are adorably inseparable and I, myself, am already married.

“I’m a Belieber, but he’s not my boyfriend.

“It’s been great to be a part of the Bieber madness … even if only for a song.”