Credit: Jason Merritt/Getty Images Photo: Whitney Houston and Daughter Bobbi Kristina Brown Attend the 2011 Pre-Grammy Gala on February 12, 2011

The world is still in mourning over the shocking and tragic loss of Whitney Houston, but there's no one more devastated than the singer's 18-year-old daughter, Bobbi Kristina Brown.

After Whitney, 48, was found lifeless in the bathtub of her Beverly Hilton hotel room on February 11, a "hysterical" and "inconsolable" Bobbi was rushed to the hospital twice in a period of 24 hours to be treated for stress and anxiety. Friends and family feared the teen might be suicidal.

According to a new report from Us Weekly, Bobbi, who was released from Cedars-Sinai Medical Center on Sunday, is doing OK now.

"Everything [was] stressful," Billy Watson, the brother of Whitney's sister-in-law, Patricia Houston, told Us.

"Her mama died, so she broke down. Nobody expected her to pass as quickly as she did. [Bobbi Kristina] had a nervous breakdown."

News of Whitney's untimely passing has affected millions of music-loving Americans, including President Barack Obama, who is keeping young Bobbi in his thoughts and prayers during this difficult time.

"I know that his [President Obama's] thoughts and prayers are with her family, especially her daughter," White House press secretary Jay Carney said in a statement.

"It's a tragedy to lose somebody so talented at such a young age."

Source: Us Weekly