The annual Holiday Pops concert by the Pittsburgh Philharmonic will be at 8 p.m. Dec. 11 in the Succop Theater. Tickets are $15. Call the theater box office from 10 a.m. to 2 p.m. Mondays through Fridays at 724-284-8505 or visit bc3.edu/Succop-theater.

[naviga:h3]Slippery Rock University[/naviga:h3]

“Holiday Nights and Days,” starring Kevin Spirtas, Broadway singer and actor, will be presented with café-style seating Dec. 4 in the University Union.

Grove City College

• Folk musician and multi-instrumentalist Jake Armerding of Boston will perform at 7 p.m. today in Crawford Hall. Admission is free.

• The student-led Orchesis Dance Troupe will perform its fall show “Unhinged” through Saturday in Ketler Auditorium of the Pew Fine Arts Center. Performances are at 7:30 p.m. each night, with a 3 p.m. matinee Saturday.

Admission is free but tickets are required. Tickets are available from 11:30 a.m. to 3:30 p.m. weekdays through Friday in Breen Student Union on campus, online at www.gcc.edu/tickets, or at the theater before shows. Doors open 30 minutes before each performance. For more information: www.gcc.edu/orchesis.

• The Fall Choral Concert will begin at 6:30 p.m. Sunday in Harbison Chapel. The concert will feature the Chapel Choir, Touring Choir and Chamber Singers. The program will include Saint-Saens' “Christmas Oratoria” and Bernstein's “Chichester Psalms.” The concert is free and tickets are not required.

• Pew Fine Arts Gallery hosts “Works by J.D. Titzel” through Saturday. The Mercer County-based artist presents paintings of landscapes, portraits and still lifes, done in oil and watercolor, along with graphite drawings.

[naviga:h3]Westminster College[/naviga:h3]

• The Celebrity Series presents the Little River Band at 7:30 p.m. Monday in Orr Auditorium. The group's singles include “Reminiscing,” “Cool Change” and “Lonesome Loser.” Tickets are $35 to $45 and are available be sending e-mail to gibg@westminster.edu or by calling 724-946-7354.

• Westminster's planetarium is presenting various shows in December. Admission is free but registration is required at www.westminster.edu/planetarium or by calling 724-946-7827.

“One World One Sky: Big Bird's Adventure,” suitable for younger audiences, will be shown at 3:30 p.m. Dec. 5.

“Let it Snow: Holiday Music Magic,” recommended for all ages, will be shown at 5 and 8 p.m. Dec. 5 and 12.

“Mystery of the Christmas Star,” recommended for ages 8 and older, will be shown at 6:30 p.m. Dec. 5 and 12.