Former Pointer Sisters member Bonnie Pointer will be joining the cast of "Celebrity Rehab" with Dr. Drew Pinsky on VH1, reports TMZ
. Sadly, the 59-year-old R&B star has battled drug addiction ever since she stepped away from the spotlight. Pointer, the youngest of the sisters, left the group to pursue a solo career and eventually broke ties with some of her family. Let's hope this legendary disco queen will get the help she needs.