A-ha! This is why Eddie Murphy joined Twitter: to promote an upcoming full-length all-reggae album called 9. He also premiered the album’s first single, “Red Light,†which is a pleasant track, complete with Snoop Dogg as his alter ego Snoop Lion and a whole lotta bass. Also, make sure you check out that sweet, sweet mean-mugging on the single cover. Is it as good as “Party All the Time†? Can anything be? (Meanwhile, it is certainly better than “Whatzupwitu.â€)