Exclusive: Justin Bieber Strikes Back: “I'm Young and I Make Mistakes”  —  Justin Bieber on the verge of a breakdown?  You better NOT believe it.  After a series of bizarre incidents led to speculation that Bieber is heading for a meltdown, the 19-year-old pop star defends himself …

EXCLUSIVE: New Kardashian Bombshell: Model Michael Girgenti Claims He May Be Mason Disick's Father  —  Kourtney Kardashian and model Michael Girgenti worked together on a photo shoot in 2008.  Now, Michael is claiming he may be the father of Kourt's oldest child, Mason Disick.

Anna Chlumsky Expecting First Child  —  She's got sunshine on a cloudy day ... and a baby on the way!  —  Anna Chlumsky and husband Shaun So are expecting their first child this summer, the Veep star confirms to PEOPLE exclusively.  —  “I'm feeling pretty good so far,” Chlumsky, 32, tells PEOPLE.

Hayden Panettiere Loves Giant Penis So Much She's Marrying It (Not A Jon Hamm Post)  —  Presumably to make Scotty McKnight feel like he has the smallest penis in the world, Hayden Panettiere not only ran back to Wladimir Klitschko but is now secretly engaged to him, according to Us Weekly:

Jon Hamm Tired of Jokes About His ‘Impressive Anatomy’  —  ‘People feel the freedom to create Tumblr accounts about my c**k,’ says actor  —  Jon Hamm has a problem most men would love to have: people all over the world are convinced he has an enormous penis.

NEWS/Lindsay Lohan's Boyfriend Avi Snow Opens Up About New Ladylove: “She's a Lot of Fun”  —  Avi Snow is finally breaking his silence about Lindsay Lohan.  —  After their final Los Angeles show Tuesday night at the Bootleg Theater, the City of the Sun guitarist had nothing but fond things …

Baby Girl on the Way for Jenna Wolfe and Stephanie Gosk  —  Jenna Wolfe is sharing some happy news: not only is she expecting her first child — a girl! — in late August, she's also coming out publicly with her partner, NBC News correspondent Stephanie Gosk.

WE'RE NOT MARRIED  —  Angelina Jolie has just made it crystal clear ... she and Brad Pitt did NOT secretly get married.  —  You'll recall, Angelina swapped out her $500,000 diamond engagement ring for a simple gold band during a recent humanitarian trip to the Congo …

Anne Hathaway, Chloe Moretz & Sam Rockwell To Star In Lynn Shelton Pic  —  EXCLUSIVE: Anne Hathaway, Chloe Moretz and Sam Rockwell are all deep in negotiations to join Laggies.  The Lynn Shelton-directed dark comedy chronicles perpetual adolescent and late-twentysomething Megan (Hathaway) …

Diana DeGarmo and Ace Young Finally Take Their Engagement Photos  —  Diana DeGarmo and Ace Young Diana DeGarmo and Ace Young Diana DeGarmo and Ace Young  —  Things are going really well for American Idol finalists Ace Young and Diana DeGarmo.  —  After becoming engaged on last May's Idol finale …

Exclusive: Shiri Appleby Gives Birth to a Baby Girl!  —  Shiri Appleby and Jon Shook are now the proud parents of a baby girl, the Girls guest star tells Us Weekly exclusively.  The engaged couple welcomed their little one on Saturday, March 23, in L.A. “She's heaven,” Appleby says of her daughter.

In Heroin Case  —  “Buckwild” star Salwa Amin has been arrested for the SECOND TIME in connection with a West Virginia drug raid last month ... a raid that turned up oxy pills and heroin ... TMZ has learned.  —  Amin was hauled in today on a bench warrant, which was issued after she allegedly blew off …

Rob Kardashian — Accused of Robbing Photog Over Shirtless Pics  —  Accused of Robbing Photog Over Shirtless Pics  —  EXCLUSIVE  —  Rob Kardashian allegedly just jacked a photog's camera equipment ... law enforcement sources tell TMZ — and according to the photog, it was all because she snapped shirtless pics of the reality star.

Replacing Me on ‘Today’  —  Sources connected with NBC tell TMZ ... network honchos approached Anderson Cooper about the possibility of replacing Matt Lauer on the “Today” show at some point ... not immediately but at some point.  —  There is a story on Deadline.com that Matt made a call …