Singer-turned-crackhead Whitney Houston has allegedly engaged in lesbian sex escapades after getting high on crack-cocaine, according to a published report. Tina Brown, Whitney's sister-in-law who claimed recently that the star is addicted to drugs and living in filth, has made new claims describing how Whitney has had several raunchy lesbian sex affairs. The National Enquirer magazine quotes her as saying, "It's no secret. I've seen her with a woman a couple of times. They were walking around without shirts on when I came in the house." And if that's not interesting enough, Whitney's husband Bobby Brown reportedly knew about the...