Ashlee Simpson performs with Ashley Parker Angel at 7:30 tomorrow night at the Warner Theatre. The show, which was originally scheduled to be at Nissan Pavilion, has seating arrangement adjustments, so check with warnertheatre.com and arrive early. Tickets are $42.50. Warner Theatre is at 13th Street (between E and F streets) Northwest, Washington. For tickets, call 410-547-SEAT or go to ticketmaster.com.