Whitney Houston has finally started work on her comeback album after stepping into a Los Angeles recording studio yesterday (13MAR07). The troubled I WILL ALWAYS LOVE YOU singer has spent time in rehab over the past year (06/07) over controversy regarding her drug abuse, but has now teamed up with her mentor Clive Davis to record tracks for a new album. With John Legend and NE-YO lined up to work with the diva, Houston is currently working with Grammy Award-winning songwriter and producer JOHNTA AUSTIN, who wrote Mariah Carey's hit WE BELONG TOGETHER. According to Fox News, music mogul CLIVE DAVIS has already selected up to seven tunes for the star, including songs by R Kelly and DIANE WARREN. Houston is also reportedly working with a vocal coach to ensure her voice has not been affected by drug abuse and smoking.