Charlie Sheen's dog keels over from malnutrition and neglect. Lady Gaga gets diamonds and a sex doll for her birthday. Kanye's new girlfriend is Pharrell's niece. Beyonce fires her dad. Tuesday gossip has a body count.

• The Letterman mess rolls on. The Late Show host issued another apology on his show last night, describing how the scandal has impacted his wife, Regina Lasko ("She's been horribly hurt by my behavior"), and kindly pointing out that he's not having sex with any of his current staffers. Meanwhile, Stephanie Birkitt, the woman at the center of the "scandal," supposedly wrote in her diary that she was dating alleged extortionist Robert "Joe" Halderman and sleeping with Letterman as recently as last fall, leading Halderman to flip out when he read her diary in December. [NYP, NYDN]
• So are Penelope Cruz and Javier Bardem engaged? While Cruz's rep went with "no comment," Bardem's flack said, "I really don't know, but would not be able to say anything even if I did." That sounds like a "yes" to us! [People]
• Celebrity chef Todd English skipped out of his wedding at the last minute this past weekend. His jilted bride went ahead with the party anyway, while English headed to South Beach to hit the bars and clubs. Classy. [P6]
• Heidi Klum has filed documents to change her name to "Heidi Samuel," since that's Seal's last name. Please update your address book accordingly. [TMZ]