Prince will play a third concert at the Horizon

Prince will play a third show when his Lovesexy '88 World Tourstops at the Rosemont Horizon, 6920 N. Mannheim, Rosemont. Tickets($22.50) for the 8 p.m. Sept. 19 concert will go on sale at noontomorrow at all Ticketmaster outlets (559-1212) but not at theHorizon box office. Tickets also will go on sale at 10 a.m. tomorrowfor the Scorpions and Kingdom Come, who will play at the Horizon at7:30 p.m. on Sept. 28. Tickets, $17.50, are available atTicketmaster outlets. The old observer of Alice's Restaurant, folkie Arlo Guthrie, willperform a solo concert at 7:30 p.m. Sept. 25 at the Park West, 322 W.Armitage. Tickets are $17.50 and available now at Ticketmasteroutlets …