PLAN AHEAD: NEXT WEEKEND

* Heavyweight piano men Elton John and Billy Joel perform at the Great Western Forum, 3900 W. Manchester Blvd., Inglewood, Tuesday and Feb. 9 and 11. $45-$175. (213) 480-3232.

* The American Cinematheque hosts “The Best of the Slamdance International Film Festival 2001” Feb. 7 and 8 at the Egyptian Theatre, 6712 Hollywood Blvd., Hollywood. $5-$7. (323) 466-3456.

* “Buddy’s Gift,” Jack Simmons’ solo show about a father’s love for his family, runs Feb. 10 to April 1 at the Coronet Studio Theatre, 366 N. La Cienega Blvd., L.A. $20. (213) 365-3500 and (310) 657-7377.

* “The Weir,” Conor McPherson’s Olivier Award-winning play about men and a mysterious woman in an Irish pub, plays Feb. 7 to March 11 at the Geffen Playhouse, 10886 Le Conte Ave., Westwood, $21-$43. (310) 208-5454 and (213) 365-3500.

* The first public program in the new Ahmanson Hall, Liz Lerman’s “Hallelujah Project” is scheduled for Feb. 10-11 at the Skirball Cultural Center, 2701 N. Sepulveda Blvd., Brentwood. $10-$18. (310) 440-4500.

* Pilobolus performs mixed rep on Feb. 9-10 at the Alex Theatre, 216 N. Brand Blvd., Glendale. $20 to $43. (800) 233-3123.