Drugs, divorce, and dwindling record sales... yes, Whitney Houston has been through some tough times. But we haven't seen the last of the superstar singer just yet, as made clear by tonight's special, Celebrity Expose - The Comeback of Whitney Houston, which airs on MyNetworkTV. Following her rehab and separation from Bobby Brown in 2006, Whitney has been hard at work on a new album, which is finally due out this November. But is it really a comeback? Her ex doesn't think so. "You can't call that a comeback! She's the diva of all divas. She's Whitney Houston," raves Bobby on tonight's show. "She has the greatest voice probably on the face of this earth... Don't count her out yet." He and Whitney are both pushing forward in their lives. "It was pretty tough," he says of their split. "After 14 years of marriage, it'd be tough on anybody. But we have a great daughter. And we're really cool friends, we talk. It is what it is. People must move on. You can't wallow in your sorrow, you can't die - you have to live."