Well, the following blind item appeared (in different permutations) in several tabloids, and was (apparently) run as a NON-blind item at one point (I'm sorry that I can't provide sources). Robbie is the subject of the blind item, and the mouthy (heh) former partner is Max Beesley.
"This filthy-rich, young and supposedly straight English male singer apparently engages in threesomes with other, supposedly straight members of the same sex. No-one would have found out about the liaisons had one of the singer's previous shags not been so impressed with the size of the star's member that he had to tell all."
ETA: technically this is *alleged*, don't want to get anyone in trouble.