Have the late Whitney Houston's bad habits rubbed off on her teenage daughter, Bobbi Kristina? Just a week ago, news surfaced that the Houston family tried to stage an intervention for 19-year-0ld Bobbi Kristina --Whitney's only child and father Bobby Brown's fourth child -- and now a video of the future reality star has surfaced, showing Bobbi smoking marijuana while visiting a college in Statesboro, Ga.

Just like Miley Cyrus, Bobbi Kristina was filmed ripping a gigantic bong with a group of friends; the party was back in March 2011, and while it hasn't been totally confirmed, a source (via Radar Online) claims that the substance in the bong was marijuana. The same source said, "Bobbi Kristina was staying with friends at the school and she brought along a big bag of pot for the party. The party was well underway by the time I got there around 11PM. When I left at 6AM the next day, she was still partying hard."

In the video that surfaced of B.K. toking up, Whitney's daughter is pictured taking a hit off of the three-foot bong before coughing and going in for round two. From the look of things, she has obviously done this before. But pot wasn't the only substance Bobbi Kristina had in her system that night, as the source continued, "Between tokes, Bobbi was drinking shots of Grey Goose and Skyy Blue vodka, and sipping a mixed vodka drink. She’s obviously a seasoned partier. With the amount of pot and alcohol she was using, I would have passed out, but she was still going strong."

Bobbi Kristina has reportedly been abusing drugs more and more as of late, with her mother's sudden passing worsening the teen's struggles. After Whitney Houston was pronounced dead, the inconsolable B.K. had to be hospitalized twice after ingesting a potentially fatal cocktail of alcohol and prescription drugs. After her mother's funeral, family members begged her to enter rehab, and another source at Radar Online also affirmed the fact that Bobbi Kristina's family is worried about her health and well being.

"Everyone is worried sick about Krissy ... Her aunt Pat got a number of her friends and family to come to Atlanta and have a serious talk with her about her sobriety," the source said. "There were lots of tears, but Bobbi Kristina didn’t listen."