whitney houston daughter bobbi kristinaWhitney Houston's 18-year-old daughter Bobbi Kristina Brown may be in trouble again.

It's no secret that Houston has had her own battles with drug addiction after much personal-turned-public turmoil and a stint in rehab in the early 2000s. But following photos that recently surfaced of Bobbi Kristina snorting cocaine, Houston is stepping up and stepping in.

According to the National Enquirer, in an attempt to save her adolescent daughter from repeating her own mistakes, the 47-year-old mama has reportedly canceled Bobbi Kristina's 18th birthday celebration at the Atlantis resort in the Bahamas, is taking back the Lexus she gifted her daughter and is sending her straight to rehab.

Bobbi Kristina attempted to debunk the cocaine photos on Twitter recently, and now she's back to shoot down rehab rumors, tweeting, "Excuse me, but I'd like to say that I am NOT going to rehab? I'm perfectly healthy and I am not addicted to anything but life."