Britney Spears Looks “Hot and Blonde” in Pussycat Dolls Video  —  Britney Spears is making a cameo in a Pussycat Dolls video — but isn't actually interacting with the group on set.  —  The 26-year-old shot her scenes for the tune “When I Grow Up” at the WB lot in Burbank, CA Wednesday while the Dolls filmed in Hollywood.

Hills Spin-off in the Works on MTV  —  Hills fans rejoice: the reality hit has spawned a new series.  —  A source tells the new issue of Us Weekly (on newsstands now) that MTV is prepping a show in which Whitney Port, 23, becomes bicoastal while working for fashion PR firm People's Revolution …

Mario Lopez and Karina Smirnoff Split  —  Karina Smirnoff and Mario Lopez have called it quits, Smirnoff's rep confirms to PEOPLE.  —  “Karina has parted ways with her two year relationship with Mario Lopez,” says Smirnoff's spokesperson.  “The relationship wasn't heading in the right direction.”

Vin Diesel Becomes a Father  —  Vin Diesel  —  Vin Diesel and his girlfriend, model Paloma Jimenez, have quietly become parents of a baby girl, his rep tells PEOPLE.  —  Diesel, 40, and Jimenez welcomed their first child on April 2.  —  Diesel is currently shooting and producing Fast and Furious …

Paris Hilton Pregnancy Rumors: “False”  —  Paris Hilton doesn't have a bun in the oven.  —  The heiress, 27, sparked blog rumors when she wore a green satin slip-dress to Crown Bar in Los Angeles Wednesday.  —  But her rep tells Usmagazine.com reports are “completely false.”

Mary-Kate Opens Up to Elle Magazine  —  Mary-Kate Olsen opens up to the new issue of Elle magazine where she graces the cover and has a nice photo spread inside.  —  On Ashley Olsen: “We don't agree all the time. … Mary-Kate's answer on if she feels she is rich and famous: “No, But it's nobody's business if I am or I'm not.

LINDSAY LOHAN - LOHAN IMPRESSES MOVIE BOSSES  —  LINDSAY LOHAN has impressed the producers of new movie LABOR PAINS with her work ethic - despite earning a reputation as a tardy star on the set of her previous movie GEORGIA RULE.  —  Lohan infuriated studio chief James G. Robinson …

36MMM breasts scoop world record  —  Who says porn stars lack amb­ition?  Maxi Mounds has made a huge name for herself - by having the largest breast implants in the world.  —  Her 36MMM bust - each weighing 9kg (20lbs) - finally made it into the record books years after she learned there was a category for natural breasts.

Rosie says she's waiting to remarry Kelli  —  Rosie says she's waiting to remarry Kelli  —  NEW YORK - Ellen DeGeneres is doing it.  So is George Takei.  But Rosie O'Donnell isn't jumping at the chance to walk down the aisle.  O'Donnell and her girlfriend, Kelli Carpenter …

Remembering Nikki Cox  —  You know every time I see new pictures of Nikki Cox, it saddens me.  I'm trying to figure out what happened to that girl I used to jerk off to while watching Unhappily Ever After.  Ya you did it too so don't make it like I'm the only one.

So You Think You Can Dance 4: Top 20 Dancers  —  America, here are your Top 20 Dancers for Season 4 of So You Think You Can Dance!  —  Pictured top row L-R: Stephen “Twitch” Boss, William Wingfield, Jessica King, Kourtni Lind, Joshua Allen, Jamie Bayard and Courtney Galiano.

An Open Letter to Jay Leno  —  Thanks, Jay.  —  I'm not sure I ever thought I'd have the chance to say those two words together given the often fractious relationship we've found ourselves in.  From your wink-wink Brokeback innuendos to Ryan Phillippe being asked to give his “gayest look …

New Mom Angela Kinsey Not Feeling ‘Red Carpet Ready’  —  Angela Kinsey of The Office is making her first public appearances this weekend since giving birth a month ago - and she's got the what-to-wear jitters.  —  “I definitely do not feel red carpet ready,” Kinsey, 36, writes on her MySpace blog.