Kate Middleton's sister usurps Prince Harry as "royal sibling most likely to dance on a banquette." Jesse James hints that Sandra Bullock wasn't that great in bed. Marie Osmond remarries her ex-husband. Thursday gossip knows how to party.

Keri Russell turns 33 today. Kenneth Cole turns 55. Chef Tom Valenti is 50. Author Jonathan Ames is 45. Ex-con shoe mogul Steve Madden turns 52. Real estate broker Leslie Garfield turns 77. Actress Catherine Keener is 50. Disgraced ex-Times reporter Jayson Blair is 33. Chaka Khan is turning 56. Actress Michelle…