1000+ Hollywood names sign letter opposing Paramount/Warner Bros. merger; Britney Spears checks into rehab following March DUI arrest; Rory McIlroy wins Masters becoming first back-to-back champ since Tiger Woods; National Peach Cobbler Day is celebrated; and celebrity birthdays: Al Green 80, Ron Perlman 76, Max Weinberg 75, Ricky Schroder 56, Bokeem Woodbine 53, Ty Dolla $ign 44, Allison Williams 38.
