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NBC anchor Brian Williams turns 50 today. Kurt Loder is 64. Caroline Hirsch, the founder of the Caroline's comedy club, is turning 59. Ad agency CEO Bob Greenberg is 61. The singer Adele is 21, as is reality TV star (and "singer") Brooke Hogan. Actor Henry Cavill (The Tudors) is 26. R&B singer Craig David turns 28. Tina Yothers of Family Ties fame is 36. And Chris Brown turns 20 today, although it's doubtful he'll be getting any special presents from Rihanna.