The couple sprang into action with Nick pulling the ailing driver from his car, placing him on the ground and elevating his leg to help blood flow to his brain. The two then remained with him until paramedics arrived to take over.
No word yet on the condition of the heart attack victim.
The 19-year-old Brown recently announced her engagement to the 22-year-old Gordon in a special sneak peek promo of their Lifetime reality show, The Houstons: On Our Own, which premieres on the cable channel Oct. 24.
A rep for Bobbi wasn't available for comment, but Brown shared an article about the incident on Twitter.