Britney Spears turns 28 today. Erin Callan, the former CFO of Lehman Brothers, is turning 44. Lucy Liu is 41. Stone Phillips is turning 55. Senate Majority Leader Harry Reid is 70. Real estate marketing queen Louise Sunshine is turning 69. Nelly Furtado turns 31. Foo Fighters bassist Nate Mendel is turning 41. Author George Saunders is 51. And tennis legend Monica Seles celebrates her 36th birthday today.

Erin Callan has had a tumultuous year, hasn't she? The former star at Lehman Bros can sit back and relax today. Not only has she landed on her feet (unlike so many of her former colleagues), it's also her 43rd birthday. Others celebrating: Stone Phillips is 54. Senate Majority Leader Harry Reid is turning 69. Real estate marketing queen Louise Sunshine is 68. Nelly Furtado is 30. Nate Mendel of the Foo Fighters is 40. Monica Seles is turning 35. Lucy Liu is 40. And Ms. Britney Spears—you've heard of her, haven't you?—is celebrating her 27th birthday today.