Ben Folds joined Mark Hoppus in singing "Happy Holidays, You Bastard," which Mark claims he wrote "a few years ago." Well, as any ex-Blink 182 fan can tell you, this song is old—but way better with Ben Folds!

Ben Folds sat down with Mashable.com last weekend to discuss Chatroulette and Merton's (the piano playing improv sensation) instant fame. Will Merton and Folds get together for a Chatroulete duet? Only time will tell.

[via JuliaSegal]

So there was speculation that piano Chatroulette improv guy Merton was actually Ben Folds. Well he definitely wasn't, because Ben Folds did it himself at a recent concert in North Carolina dressed up as Merton—and it was fantastic.

It's night two of the epic Sing-off, or The Subtle Train Wreck of 2009. Last night, the show proved to be educational beyond my wildest dreams. Did Nick Lachey and the gang keep it up tonight? HELL YEAH, they did!

Tonight, NBC premiered The Sing-off—a four-day a cappella group competition that was marketed as a cross between American Idol and Glee—and it was amazing, for all the wrong reasons. Here are the six things I learned while watching.

CNBC's one-time "money honey," Maria Bartiromo, turns 42 today. Moby is turning 44. Marie-Josée Kravis, the wife of billionaire Henry Kravis, is 60. The rapper Ludacris is 32. Brokerage founder Muriel Siebert is 77. Hedge funder David Tepper is turning 52. Political operative Bill Cunningham is 59. Singer Harry Connick Jr. turns 42. Director Brian De Palma is turning 68. Daily Kos founder Markos Moulitsas is 38. Actress Taraji P. Henson turns 39. And hockey player Mike Comrie, who may be better known for being Hilary Duff's boyfriend, is turning 29. Weekend birthdays after the jump.

Author James Frey turns 39 today. Another author who has dealt with a bit of controversy is celebrating, too: Jessica Seinfeld, the wife of Jerry Seinfeld, is 37. Restaurateur Stephen Hanson is turning 59. Sculptor Robert Gober is 54. Photographer Nan Goldin is 55. Emmy Rossum is turning 22. Actor Benjamin McKenzie is 30. Book designer Chip Kidd is turning 44. Blogger and former magazine dude Jeff Jarvis is 54. Literary agent David McCormick is 47. Ben Folds is 42. And two American Idol winners are celebrating: Jennifer Hudson is 27 and Ruben Studdard is 30. On Saturday, former Yankees outfielder Bernie Williams will turn 40, Stella McCartney will turn 37, Ben Savage will be 28, and Fiona Apple will celebrate her 31st. On Sunday: Sex and the City producer Michael Patrick King will be 54, Nas will celebrate his 35th, model Carmen Kass will be 30, and former financial titan (and Mike Bloomberg's former boss) John Gutfreund will be 79.