Rachel Tucker, who played Meg, the radiant redhead in Sting's 'The Last Ship,' will be the special guest at 'Seth's Broadway Chatterbox' on Thurs., Jan. 29, at 5 p.m. at Don't Tell Mama, 343 W. 46th St., NYC. Tickets, $10 (which goes to Broadway Cares); two-drink minimum. Reservations: (212) 757-0788. Rachel Tucker sings 'August Winds,' accompanied by Sting