Hip-hop albums are big, of course, on guests and cameos. With an institution like Snoop Dogg, it’s getting to be like the freakin’ Bob Hope Christmas Special
. Willie Nelson strums and trades verses on “Superman,” about learning your limitations. A clip from Snoop’s interview with Larry King turns up on “Gangbang Rookie.” R. Kelly, Kanye West, Wiz Khalifa and a Yaz sample help fill out the 80 minutes. Like Jay-Z, Snoop raps casually as if the beats were trying to keep up. “Wet” conceives an autotune aphrodisiac that gives the next track “Take U Home” extra horndog authority. Groundbreaking this is not, but his personality makes for splendid showbiz.