Brown told TV's "Access Hollywood" Houston was "doing wonderful and everything about her spirit right now is just great."
He said he hoped working on her next album with long-time mentor Clive Davis will keep her upbeat and focused.
"Hopefully I will get to work with her on this album again," he said. "I'm just looking forward to her just being herself."
Brown said some of her struggles may be evident when his upcoming reality show "Being Bobby Brown" debuts on Bravo June 30.
"We were shooting during the time that she started rehab, so you'll see a transformation of just coming out of rehab into full blown-out woman again," he said.