Here's what's being talked about today in pop culture:
• Michael Bay's crime comedy "Pain & Gain" led the weekend box office, with $20 million - while "The Big Wedding" was a big lemon, scoring only $7.5 million. All will be blown to smithereens this weekend, as "Iron Man 3" ushers in the summer blockbuster season. [Box Office Mojo]
• NBA center Jason Collins, a free agent after being traded midseason away from the Boston Celtics, has become the first active player for a major American men's sports league to come out as gay. [Sports Illustrated]
• Michael Diamond and Adam Horowitz, a k a Mike D and Ad-Rock, the surviving members of the Beastie Boys, have signed a deal to write a book due out in 2015. [The Hollywood Reporter]