Whitney Houston - Breast Implants?

Does Whitney Houston have breast implants? This photo from Ayyyy! is very suggestive of it. The two half-grapefruit look can often signify breast implants placed above the muscle in a person with very little breast tissue.
In these patients the implant makes up nearly the entire breast and the round look of the implant is not blunted by the muscle covering it. For this reason, in really thin patients it is often best to put the implants partially under the pectoralis muscle.