SANTA MONICA, Calif. (AP) — Hard to believe Ol’ Blue Eyes has been gone this long. The Grammy people are putting together a big event to mark what would have been Frank Sinatra’s 100th birthday. On Dec. 2, artists like Alicia Keys, Adam Levine, Carrie Underwood, John Legend and Garth Brooks will gather in Las Vegas to tape the special: “Sinatra 100 — An All-Star Grammy Concert.” It will air Dec. 6 on CBS.